回车 点击按钮
回车 点击按钮,回车提交，点击回车提交，点击回车=单击按钮
<body >
<form name="form">
<input name="txt" size="100" value="Mouse点我提交，按Enter也提交" onClick="form.submit()" onKeyDown="if (event.keyCode==13)form.submit()">
</form>
<body >
<form name="form">
<input name="txt" size="100" value="Mouse点我提交，按Enter也提交" onClick="form.submit()" onKeyDown="if (event.keyCode==13)form.submit()">
</form>