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

} 

function clickNS(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=clickNS;
}
else
{
	document.onmouseup=clickNS;
	document.oncontextmenu=clickIE;
}

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