Javascript阻止表單提交

Javascript阻止表單提交
Html
1.<form?name="loginForm"?action="login.aspx"?method="post">??
2.????<button?type="submit"?value="Submit"?id="submit">Submit</button>??
3.</form>??
Js 第一種方法
1.<script>??
2.????var?submitBtn?=?document.getElementById("submit");??
3.????submitBtn.onclick?=?function?(event)?{??
4.????????alert("preventDefault!");??
5.????????return?false;??
6.????};??
7.</script>??
Js 第二種方法
1.<script>??
2.????var?submitBtn?=?document.getElementById("submit");??
3.????submitBtn.onclick?=?function?(event)?{??
4.????????alert("preventDefault!");??
5.????????var?event?=?event?||?window.event;??
6.????????event.preventDefault();?//?兼容標準瀏覽器??
7.????????window.event.returnValue?=?false;?//?兼容IE6~8??
8.????};??
9.</script>??
出處 http://www.dengzhr.com

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