复制代码代码如下：
<！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 = utf-8" />
<Title> JS </title>
<script type = "text/javascript"言語= "javascript">
function chang（）{
var evt = event || window.event;
alert（evt.srcelement.id）;
}
</script>
</head>
<div>
<input type = "text" onclick = "chang（）;" id = "input_a" />
<input type = "text" onclick = "chang（）;" id = "input_b" />
</div>
<body>
</body>
</html>