function BrowserInfo() 
{
	var agt = navigator.userAgent.toLowerCase();
	this.version = parseFloat(navigator.appVersion);
	this.isIE = (agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1);
	this.isIE4up = this.isIE && (this.version >= 4);
	if (this.isIE) 
	{
		if (this.isIE4up) 
		{
			if (agt.indexOf("msie 6") != -1) this.version = 6;
			else if (agt.indexOf("msie 5.5") != -1) this.version = 5.5;
			else if (agt.indexOf("msie 5") != -1) this.version = 5;
		} 
		else this.version = 3;
	}
	this.isIE5up = this.isIE && (this.version >= 5);
	this.isIE5_5up = this.isIE && (this.version >= 5.5);
	this.isIE6up = this.isIE && (this.version >= 6);
	this.isNN = (agt.indexOf('mozilla') != -1) && (agt.indexOf('spoofer') == -1) &&
			(agt.indexOf('compatible') == -1) && (agt.indexOf('opera') == -1) &&
			(agt.indexOf('webtv') == -1) && (agt.indexOf('hotjava') == -1);
	this.isNN4up = this.isNN && (this.version >= 4);
	this.isNN6up = this.isNN && (this.version >= 5);
	this.isOnline = true;
	if (this.isIE4up) this.isOnline = navigator.onLine;
	this.name = "Unknown";
	if (this.isIE) this.name = "Internet Explorer";
	else if (agt.indexOf("netscape6/") != -1) 
	{
		this.name = "Netscape";
		this.version = parseFloat(agt.substr(agt.indexOf("netscape6/") + 10));
		if (!this.version) this.version = 6;
	} 
	else if (agt.indexOf('gecko') != -1) this.name = "Mozilla";
	else if (this.isNN) this.name = "Netscape Navigator";
	else if (agt.indexOf("aol") != -1) 
	{
		this.name = "AOL Browser";
		if (this.version < 4) this.version = 3;
	}
	else if (agt.indexOf("opera") != -1) 
	{
		this.name = "Opera";
		this.version = parseFloat(agt.substr(agt.indexOf("opera") + 6));
	}
	else if (agt.indexOf("webtv") != -1) this.name = "WebTV";
	else if ((agt.indexOf("navio") != -1) || (agt.indexOf("navio_aoltv") != -1)) this.name = "AOL TV Navigator";
	else if (agt.indexOf("hotjava") != -1) this.name = "HotJava";
	this.fullName = this.name + ' ' + this.version;
	if (this.version == Math.floor(this.version)) this.fullName += '.0';
}

var currentBrowser = new BrowserInfo();
if (currentBrowser.name != 'Mozilla' && currentBrowser.name != 'Opera' && currentBrowser.name != 'Internet Explorer')
{
	alert('You use '+currentBrowser.fullName+' browser. \r\nOur site does not support this type of browser.\r\nPlease, use Mozilla or Opera');
}