<script type="text/javascript"> document.body.oncontextmenu=document.body.ondragstart= document.body.onselectstart=document.body.onbeforecopy=function(){return false;} ; document.body.onselect=document.body.oncopy=document.body.onmouseup=function(){document.selection.empty();} ;</script>
原文：http://www.cnblogs.com/zgzy/p/4888358.html