<body oncontextmenu="window.event.returnValue=false"
onkeypress="window.event.returnValue=false"
onkeydown="window.event.returnValue=false"
onkeyup="window.event.returnValue=false"
ondragstart="window.event.returnValue=false"
onselectstart="event.returnValue=false">
</body>
原文：http://www.cnblogs.com/qianrong/p/4613464.html