<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtmll/DTD/xhtmll-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>form表单</title>
<script type="text/javascript">
function window_onload()
{
var numberForms=document.forms.length;
var formIndex;
for(formIndex=0;formIndex<numberForms;formIndex++)
{
alert(document.forms[formIndex].name;
} }
</script></head>
<body onload="window_onload()">
<form action=" " name="form1">
<p>
this is inside form1
</p></form>
<form action=" " name="form2">
<p>
this is inside form2
</p></form>
<form action=" " name="form3">
<p>
this is inside form3
</p></form>
</body>
</html>
调试报错:"window_onload()"未定义,求解释