var browserName = navigator.appName;
	var browserVersion = parseInt(navigator.appVersion);
	var browserSubVersion;
	var browser;

	if(navigator.appVersion.indexOf("Mac")!=-1){
		browser = "mac";
	}else if (browserName == "Netscape" && browserVersion == 5) {
		//browser = "nn6";
		var browserSubVersion = navigator.userAgent.substring(navigator.userAgent.lastIndexOf("/"), navigator.userAgent.length);
		browserSubVersion = browserSubVersion.replace(/[a-z,$(,$)]+/,"");
		browserSubVersion = browserSubVersion.replace(/\//,"");
		browserSubVersion = browserSubVersion.split(".");
		browser = 'nn'+browserSubVersion[0];
		browserVersion = browserSubVersion[0];
		browserSubVersion = browserSubVersion[1];
		
	}
	else if (browserName == "Netscape" && browserVersion == 4) {
		browser = "nn4";
	}
	else if (browserName == "Microsoft Internet Explorer" && browserVersion == 4 && navigator.appVersion.indexOf("MSIE 7.") != -1) {
		browser = "ie7";  
	}
	else if (browserName == "Microsoft Internet Explorer" && browserVersion == 4 && navigator.appVersion.indexOf("MSIE 6.0") != -1) {
		browser = "ie6";  
	}
	else if (browserName == "Microsoft Internet Explorer" && browserVersion == 4 && navigator.appVersion.indexOf("MSIE 5.5") != -1) {
		browser = "ie55";
	}
	else if (browserName == "Microsoft Internet Explorer" && browserVersion == 4 && navigator.appVersion.indexOf("MSIE 5.0") != -1) {
		browser = "ie5";
	}
	else if (browserName == "Microsoft Internet Explorer" && browserVersion == 4) {
		browser = "ie4";
	}
	else if (browserName == "Microsoft Internet Explorer") {
		browser = "ie7Up";
	}
	else{
		browser = "unknown";  	
	}
	
	
	if ( (browser == 'nn4') || (browser == 'nn6') || (browser == 'ie4') ){
		//window.location="error.html";
	}