//屏蔽右键
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;  
document.onmousedown   =   norightclick;