实例1：
<!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=gb2312" />
<title>getElementsByName</title>
</head>
<body >
<p name="pr" ff="pr"> aaa </p>
<p name="pr" ff="pr"> bbb </p>
<p name="pr" ff="pr"> ccc </p>
<p name="pr" ff="pr"> ddd </p>
<p name="pr" ff="pr"> eee </p>
<p name="pr" ff="pr"> eee </p>
<p name="pr" > eee </p>
<p name="pr" > eee </p>
<input type="button" onclick="myFun()" value="按钮"/>
</body>
<script type="text/javascript" >
function myFun() {
var count = 0;
var pArr = document.getElementsByTagName_r("p");
for(var i=0;i<pArr.length;i++) {
var p = pArr[i];
if (p.getAttribute("ff") == "pr" ) {
count++;// 符合要求的p标签数目
}
}
alert(count);
}
</script>
</html>
实例2：
<!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=gb2312" />
<title>getElementsByName2[拿到name是pr的p标签对象数组]</title>
</head>
<body >
<p name="pr" ff="pr"> aaa </p>
<p name="pr" ff="pr"> bbb </p>
<p name="pr" ff="pr"> ccc </p>
<p name="pr" ff="pr"> ddd </p>
<p name="pr" ff="pr"> eee </p>
<p name="pr" > eee </p>
<p name="pr" > eee </p>
<p name="pr" > eee </p>
<input type="button" onclick="myFun()" value="按钮"/>
</body>
<script type="text/javascript">
var getElementsByName = function(name){
var rets = document.getElementsByName(name);
if(rets.length == 0) {
rets = [];
var alls = document.getElementsByTagName_r("*");
for(var i=0;i<alls.length ; i++) {
if(alls[i].getAttribute("name") == name) {
rets.push(alls[i]);
}
}
}
return rets;
};
function myFun() {
var res = getElementsByName("pr");
alert(res.length);
}
</script>
</html>