代码如下:
<html>
<body>
<form name="form1" action="qqq" method="post">
<p>Zhanghao: <input type="text" name="zhanghao" id="zhanghao" /></p>
<input type="button" name="aaaaa" value="aaaa" onClick="check()" />
</form>
<script language="JavaScript">
function check(){
window.alert("进入JavaScript");
var valid = true;
var q = document.getElementById("zhanghao").value;
if(q=="") window.alert("aaaaaaaaaaa");
if(valid==false) document.form1.submit();
}
</script>
</body>
</html>
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