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");