鼠标右键绝对禁止法

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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
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  {
   event.cancelBubble = true
   event.returnValue = false;
   return false;
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}

document.oncontextmenu = nocontextmenu;  // for IE5+
document.onmousedown = norightclick;  // for all others
//-->
</script>

原文转自：http://www.ltesting.net