js 文本框不能粘贴或反手键

<mce:script language="JavaScript"><!--function fnckeystop(evt){ if(! window.event){ var keycode=evt.keycode; var key=String.fromcharcode(keycode).toLowercase(); if(evt.ctrlkey&&key=="v"){ evt.preventDefault(); evt.stopPropagation(); } }} // --></mce:script><textarea rows='5' onkeydown='fnckeystop(event)' onpaste='return false' oncontextmenu='return false'>

 

转自：http://hi.baidu.com/t_vivien/blog/item/7d89e23edd92350dbaa167c9.html