function nrcIE()
{
	if (document.all){return false;}
}

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

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

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