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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>禁用浏览器默认事件</title>
<script>
window.onload=function(){
var myForm=document.getElementById("myForm");
myForm.onsubmit=function(){
alert("这里就可以判断表单填写是否正确，不正确就返回false禁止提交");
return false;
}
}
</script>
</head>
<body>
<form method="post" action="http://jianhaozhan.cn/" id="myForm">
<input type="submit" />
</form>
</body>
</html>