function key(){ 
//if(event.shiftKey){return false;}
//½ûÖ¹shift
if(event.altKey){return false;}
//½ûÖ¹alt
if(event.ctrlKey){return false;}
//½ûÖ¹ctrl
}

document.onkeydown=key;
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;

function disableselect(e){return false}
function reEnable(){return true}
document.onselectstart=new Function ("return false")

if (window.sidebar){
	document.onmousedown=disableselect
	document.onclick=reEnable
}