document.onkeydown=function()
{
if ((window.event.keyCode==116)|| //ÆÁ±Î F5
(window.event.keyCode==122)|| //ÆÁ±Î F11
(window.event.shiftKey && window.event.keyCode==121) //shift+F10
)
{ 
window.event.keyCode=0;
window.event.returnValue=false;
} 
if ((window.event.altKey)&&(window.event.keyCode==115)){ //ÆÁ±ÎAlt+F4
window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px");
return false;
}
}

 


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