js验证Email

一.相关的代码<br><div style="border: 1px solid rgb(204, 204, 204); padding: 4px 5px 4px 4px; font-size: 13px; width: 98%; background-color: rgb(238, 238, 238);">
<span style="color: rgb(0, 128, 128);">1</span><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt=""><span style="color: rgb(0, 0, 0);">functiontest()<br></span><span style="color: rgb(0, 128, 128);">2</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">{<br></span><span style="color: rgb(0, 128, 128);">3</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">vartemp=document.getElementById("text1");<br></span><span style="color: rgb(0, 128, 128);">4</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">//对电子邮件的验证<br></span><span style="color: rgb(0, 128, 128);">5</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">varmyreg=/^([a-zA-Z0-9]+[_|/_|/.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|/_|/.]?)*[a-zA-Z0-9]+/.[a-zA-Z]{2,3}$/;<br></span><span style="color: rgb(0, 128, 128);">6</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">if(!myreg.test(temp.value))<br></span><span style="color: rgb(0, 128, 128);">7</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">{<br></span><span style="color: rgb(0, 128, 128);">8</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">alert('提示/n/n请输入有效的E_mail！');<br></span><span style="color: rgb(0, 128, 128);">9</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">myreg.focus();<br></span><span style="color: rgb(0, 128, 128);">10</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">returnfalse;<br></span><span style="color: rgb(0, 128, 128);">11</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">}<br></span><span style="color: rgb(0, 128, 128);">12</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">}<br></span><span style="color: rgb(0, 128, 128);">13</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">//由于方法相同，一下只写出相关的正则表达式<br></span><span style="color: rgb(0, 128, 128);">14</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">//对于手机号码的验证（提供了两种方法）<br></span><span style="color: rgb(0, 128, 128);">15</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">varmobile=/^((13[0-9]{1})|159|153)+/d{8}$/;<br></span><span style="color: rgb(0, 128, 128);">16</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">varmobile1=/^(13+/d{9})|(159+/d{8})|(153+/d{8})$/;<br></span><span style="color: rgb(0, 128, 128);">17</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">//对于区号的验证<br></span><span style="color: rgb(0, 128, 128);">18</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">varphoneAreaNum=/^/d{3,4}$/;<br></span><span style="color: rgb(0, 128, 128);">19</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">//对于电话号码的验证<br></span><span style="color: rgb(0, 128, 128);">20</span><span style="color: rgb(0, 0, 0);"><img align="top" src="http://www.cnblogs.com/Images/OutliningIndicators/None.gif" alt="">varphone=/^/d{7,8}$/;</span>
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<br>二.解释相关的意义<br> 1./^$/ 这个是个通用的格式。<br> ^ 匹配输入字符串的开始位置；$匹配输入字符串的结束位置<br> 2.里面输入需要实现的功能。<br> *匹配前面的子表达式零次或多次；<br> + 匹配前面的子表达式一次或多次；<br> ？匹配前面的子表达式零次或一次；<br>/d 匹配一个数字字符，等价于[0-9]<br><br>