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;

//½ûÖ¹ÓÒ¼ü²Ëµ¥

function hideLayer() {
   if (document.getElementById) // IE5+, NN6+
     oElement = document.getElementById("ie");
   else if (document.all)   // IE4
     oElement = document.all("ie");
   else if (document.layers)   // NN4
     oElement = document.layers["ns"];
       if (oElement != null && document.layers)
         oElement.visibility = "hidden";
       else if (oElement != null)
         oElement.style.visibility = "hidden";
}
//¼ÓÔØÒ³Ãæ