点击按钮时没有反应？
<!DOCTYPE HTML>
<html>
<head>
<script type="text/javascript">
function getnum(){
var mynode=document.getElementsByName(myt);
alert(mynode.length);
}
</script>
</head>
<body>
<input name="myt" type="text" value="1">
<input name="myt" type="text" value="2">
<input name="myt" type="text" value="3">
<input name="myt" type="text" value="4">
<input name="myt" type="text" value="5">
<input name="myt" type="text" value="6">
<br />
<input type="button" onclick="getnum()" value="看看有几项？" />
</body>
</html>
要记得打引号哦