var Help=null;
var lUrl=null;
function help(url,w,h)
{
	if( Help==null || Help.closed ){

		Help=window.open(url, "Help", 'dependent=yes,toolbar=no,location=no,directories=no,status=no,menubar=0,scrollbars=yes,resizable=no,copyhistory=no,width='+w+',height='+h+',top=1,left=1');
	}
	else if( lUrl!=url )
	{
		Help=window.open(url, "Help", 'dependent=yes,toolbar=no,location=no,directories=no,status=no,menubar=0,scrollbars=yes,resizable=no,copyhistory=no,width='+w+',height='+h+',top=1,left=1');
		Help.focus();
	}
	else
	{
		Help.focus();
	}
	lUrl=url;
	return false;
}