var _isnav4 = (navigator.appName == "Netscape" && parseInt(navigator.appVersion) == "4")?1:0;
	var _isnav6 = (navigator.appName == "Netscape" && parseInt(navigator.appVersion) == "5")?1:0;
	var _isie5 = (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) == "4")?1:0;
	var _isie6 = (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) == "5")?1:0;
	var _isopera5 = (navigator.userAgent.indexOf("Opera 5")>-1  && parseInt(navigator.appVersion) == "5")?1:0;
	var _isopera6 = (navigator.userAgent.indexOf("Opera 6")>-1 && parseInt(navigator.appVersion) == "6")?1:0;
	var _isopera = (navigator.userAgent.indexOf("Opera")>-1)?1:0;
	var _isie = (navigator.appName == "Microsoft Internet Explorer")?1:0;
	var _isnav = (navigator.appName == "Netscape")?1:0;