本文详细介绍了正则表达式的三个常用方法：test、exec 和 compile 的功能和用法，包括它们的语法、参数、返回值以及注意事项。通过综合举例，深入理解正则表达式的使用场景与技巧。
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RegExp对象的常用方法有test、exec和compile，本节介绍这些方法的功能和用法。最后，对RegExp对象的属性和方法进行一个综合举例。
2.1<wbr><span style="font-size:18px"></span><wbr><span style="font-size:18px">test方法</span></wbr></wbr>
语法格式为test(str)。该方法检查一个字符串中是否存在创建RegExp对象实例时所指定的表达式模式，如果存在就返回True，否则返回False。如果找到匹配项，则会更新RegExp对象中的有关静态属性，以反映匹配情况。
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2.2<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>exec方法</strong></span></wbr></wbr>
语法格式为exec(str)。该方法使用创建RegExp对象实例时所指定的表达式模式对一个字符串进行搜索，并返回一个包含搜索结果的数组。
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>如果为正则表达式设置了全局标志（g），可以通过多次调用exec和test方法在字符串中进行连续搜索，每次都是从RegExp对象的lastIndex属性值指定的位置开始搜索字符串。</strong></span></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>如果没有设置全局标志（g），则exec和test方法忽略RegExp对象的lastIndex属性值，从字符串的起始位置开始搜索。</strong></span></wbr></wbr></wbr></wbr></wbr>
如果exec方法没有找到匹配，返回值为null；如果找到匹配，则返回一个数组，并更新RegExp对象中有关静态属性以反映匹配情况。返回数组中的元素0包含了完整的匹配结果，而元素1～n依次是表达式模式中定义的各个子匹配的结果。
exec方法返回的数组有3个属性，分别是input、index和lastIndex。
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>input属性是整个被搜索的字符串。</strong></span></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>index属性是指匹配在整个被搜索字符串中的位置。</strong></span></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>lastIndex属性是指匹配的子字符串的最后一个字符的下一个字符位置。</strong></span></wbr></wbr></wbr></wbr></wbr>
代码2.1是对该方法的应用举例。
代码2.1<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>exec()方法应用：2.1.htm</strong></span></wbr></wbr>
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<title>exec()方法应用</title>
<scriptlanguage = "JavaScript">
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong> varmyString="aaa 111 bbb 222 ccc 1111 222ddd";</strong></span></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong> varregex =/111/;</strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>//创建正则表达式对象</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong> vararray=regex.exec(myString);</strong></span></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong> if(array){</strong></span></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>var str="找到了匹配子串!"+"\n返回数组的值为:"+array+"\n数组元素个数："</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>+array.length+"\n被搜索的字符串为："+array.input</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>+"\n匹配子串的开始位置为："+array.index</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>+"\n匹配子串后面第一个字符的位置为："+regex.lastIndex;</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>alert(str);</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>}</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>else{</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>alert("未找到匹配子串！！");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>}</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
</script>
<body></body>
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2.3<wbr><span style="font-size:18px"></span><wbr><span style="font-size:18px">compile方法</span></wbr></wbr>
语法格式为compile("pattern"[,"flags"])。该方法可以更换RegExp对象实例所使用的表达式模式，并将新的表达式模式编译为内部格式，从而使以后的匹配过程执行更快。如果要在循环中重复使用某个表达式，对其进行编译将使执行加速。但是，如果在程序中使用了任何其他表达式模式后，再使用原来编译过的表达式模式，则这种编译毫无<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>益处。</strong></span></wbr></wbr>
2.4<wbr><span style="font-size:18px"></span><wbr><span style="font-size:18px"> 综合举例</span></wbr></wbr>
代码2.2是对RegExp对象的综合举例，认真分析代码及其运行结果，可以更好地理解RegExp对象。
代码2.2<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>RegExp对象的使用：2.2.htm</strong></span></wbr></wbr>
<scriptlanguage="javascript">
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>var strSrc = "xxa1b01c001yya2b02c002zz</strong></span><wbr><span style="font-size:18px"><strong>";</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>var re = /a(\d)b(\d{2})c(\d{3})/gi;</strong></span></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>var arr, count = 0;</strong></span></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>while ((arr = re.exec(strSrc)) != null)</strong></span></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>{</strong></span></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>displayResult();</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>}</strong></span></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>function displayResult()</strong></span></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>{</strong></span></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("<p>这是用正则表达式/" + re.source + "/gi对字符串<br>""</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>+ RegExp.input + ""进行第" + (++count) + "次搜索的结果：<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("RegExp.index为" + RegExp.index + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("RegExp.lastIndex为" + RegExp.lastIndex + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("RegExp.lastMatch为" + RegExp.lastMatch + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("RegExp.lastParen为" + RegExp.lastParen + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("RegExp.leftContext为" + RegExp.leftContext + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("RegExp.rightContext为" + RegExp.rightContext +"<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("RegExp.$1为" + RegExp.$1 + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("RegExp.$2为" + RegExp.$2 + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("RegExp.$3为" + RegExp.$3 + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("RegExp.$4为" + RegExp.$4 + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("arr.index为" + arr.index + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("arr.input为" + arr.input + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("arr.lastIndex为" + arr.lastIndex + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("返回数组的元素个数为" + arr.length + "<br>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write("返回数组的内容为["];</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>for(var i=0; i<arr.length; i++)</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>{</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>if(i < arr.length-1)</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write(""" + arr[i] + "",");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>else</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>document.write(""" + arr[i] + "")</p>");</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>}</strong></span></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>
<wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong></strong></span><wbr><span style="font-size:18px"><strong>}</strong></span></wbr></wbr></wbr></wbr></wbr></wbr>
</script>
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