function clickIE()
{
	if (document.all) {
		if (event.button == 2) 
		{ 
			alert(popup);
			return false;
		}
	}
}

function clickNS(e) {
	if (document.layers||(document.getElementById&&!document.all))
	{
		if (e.which==3) {alert(popup);return false;}
	}
}

if (document.layers)
{
	
	document.captureEvents(Event.MOUSEDOWN);
	document.onmousedown=clickNS;
}
else
{
	document.onmouseup=clickNS;
	document.onmousedown=clickIE;
	document.oncontextmenu=clickIE;
}

document.oncontextmenu=new Function("return false")