// JavaScript Document
//½ûÖ¹×óÓÒ¼ü
if (window.Event)  
document.captureEvents(Event.MOUSEUP);  
function nocontextmenu(){  
event.cancelBubble = true  
event.returnValue = false;  
return false;  
}   
function norightclick(e){  
if (window.Event){  
if (e.which == 2 || e.which == 3)  
return false;  
}  
else  
if (event.button == 2 || event.button == 3){  
event.cancelBubble = true  
event.returnValue = false;  
return false;  
}  
}   
document.oncontextmenu = nocontextmenu; // for IE5+  
document.onmousedown = norightclick; // for all others 

//½ûֹѡÖдúÂë
document.oncontextmenu=new Function("event.returnValue=false;");
document.onselectstart=new Function("event.returnValue=false;");