本文介绍了一种使用JavaScript检查HTML页面上多个分组单选按钮是否有被选中的方法。提供了两个示例函数，分别用于检查单个组和多个组中的单选按钮是否至少有一个被选中。
有两组INPUT值，A01，A02，如下
<input name="A01" value="FD" type="radio">
<input name="A01" value="ERERER" type="radio">
<input name="A01" value="HGHGHGH" type="radio">
<input name="A02" value="FD" type="radio">
<input name="A02" value="ERERER" type="radio">
<input name="A02" value="HGHGHGH" type="radio">
两组值中有一个属性为CHECKED， 就返回TRUE，否则返回FALSE
用JAVASCRIPT怎么写呢？
<input name="A01" value="FD" type="radio">
<input name="A01" value="ERERER" type="radio">
<input name="A01" value="HGHGHGH" type="radio">
<input name="A02" value="FD" type="radio">
<input name="A02" value="ERERER" type="radio">
<input name="A02" value="HGHGHGH" type="radio">
两组值中有一个属性为CHECKED， 就返回TRUE，否则返回FALSE
用JAVASCRIPT怎么写呢？
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<head>
<title>无标题文档</title>
<script>
function checkRadio(){
var flag = false;
var radios = document.getElementsByName("A01");
for(var i = 0; i < radios.length && !flag; i++){
flag = flag || radios[i].checked;
}
radios = document.getElementsByName("A02");
for(var i = 0; i < radios.length && !flag; i++){
flag = flag || radios[i].checked;
}
return flag;
}
</script>
</head>
<body>
<form>
<input name="A01" value="FD" type="radio"/>
<input name="A01" value="ERERER" type="radio"/>
<input name="A01" value="HGHGHGH" type="radio"/>
<input name="A02" value="FD" type="radio"/>
<input name="A02" value="ERERER" type="radio"/>
<input name="A02" value="HGHGHGH" type="radio"/>
<input type="button" value="验证" onclick="alert(checkRadio())"/>
<input type="reset" value="清空">
</form>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb_23-12" />
<title>无标题文档</title>
<script>
function chkRadio(n)
{//检查一项
var o = document.getElementsByName(n);
for(var i = 0;i < o.length;i++) if(o[i].checked) return true
return false;
}
function withTow()
{//合并两项
alert(chkRadio("A01") && chkRadio("A02"));
}
</script>
</head>
<body>
<input name="A01" value="FD" type="radio">
<input name="A01" value="ERERER" type="radio">
<input name="A01" value="HGHGHGH" type="radio">
<input type="button" value="检测A01" onclick="alert(chkRadio('A01'))">
<input name="A02" value="FD" type="radio">
<input name="A02" value="ERERER" type="radio">
<input name="A02" value="HGHGHGH" type="radio">
<input type="button" value="检测A02" onclick="alert(chkRadio('A02'))"> <br><br>
<input type="button" value="检测两项" onclick="withTow()">
</body>
</html>
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