// JScript 文件
document.body.oncontextmenu=function(){return false;}; 
document.body.ondragstart=function(){return false;}; 
document.body.onselectstart=function(){return false;}; 
document.body.onbeforecopy=function(){return false;}; 
document.body.onselect=function(){document.selection.empty();}; 
document.body.oncopy=function(){document.selection.empty();}; 
document.body.onmouseup=function(){document.selection.empty();};