javascript 限制输入和粘贴,兼容IE和火狐3.x
<html>
<head>
<script type="text/javascript">
function upLoadKey(e){
((document.all) ? true:false) == true ? (window.event.returnValue = false): e.preventDefault();
}
</script>
</head>
<body>
<input name="textfield3" type="file" id="textfield3" size="30" value="" onkeydown="upLoadKey(event);" onpaste="return false;" onmousedown="document.oncontextmenu = function() { return false;}" onmouseout="document.oncontextmenu = function() { return true;}" style = "ime-mode:disabled" />
<div>
window.event.returnValue = false? 屏蔽ie键盘输入
<br>
e.preventDefault()? 屏蔽firefox键盘输入
<br>
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</div>
</body>
</html>
