var NS4, IE, IE4, NS6, IE5, IE6;
    NS4 = (document.layers);
    IE = IE4 = (document.all && document.getElementById);  //must be before NS6 declaration
    NS6 = (document.getElementById);
    ver4 = (NS4 || IE4);
    IE5 = (IE4 && navigator.appVersion.indexOf("5.")!=-1);
	IE6 = (IE4 && navigator.appVersion.indexOf("6.")!=-1);
//	isMac = (navigator.appVersion.indexOf("Mac") != -1);
//	isMenu = (NS4 || (IE4 && !isMac) || (IE5 && isMac));
	if (top.location != location)
	        top.location = location;