<!--屏蔽鼠标右键 
 
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 
//-->