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
/*
if ((event.keyCode==8)||            //ÆÁ±ÎÍ˸ñɾ³ý¼ü
	(event.keyCode==116)) {          //ÆÁ±Î F5 ˢмü
	event.keyCode=0;
	event.returnValue=false;
}
*/