屏蔽网页中鼠标右键、上下文菜单

据整理，使用一下js脚本就能完成：

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;  // 

来试一试：