if (document.layers)
{
	document.captureEvents(Event.MOUSEDOWN);
	document.onmousedown=Geckocheck;
}
else if (document.all&&!document.getElementById)
{
	document.onmousedown=IEcheck;
}

function IEcheck(){
	if (event.button==2)
	{
		return false;
	}
}

function Geckocheck(e)
{
	if (document.layers||document.getElementById&&!document.all)
	{
		if (e.which==2||e.which==3)
		{
			return false;
		}
	}
}

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