function browser_is_IE6()
{
  if (window.external && (typeof window.XMLHttpRequest == "undefined")) 
  {
    // javascript targeting IE 6
    return true;
  }
  else return false;
}

//Browser name: BrowserDetect.browser 
//Browser version: BrowserDetect.version 
//OS name: BrowserDetect.OS 
//
// use as: var BrowserDetect = detectBrowser();
function detectBrowser()
{
  var BrowserDetect = {
  	init: function () {
  		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
  		this.version = this.searchVersion(navigator.userAgent)
  			|| this.searchVersion(navigator.appVersion)
  			|| "an unknown version";
  		this.OS = this.searchString(this.dataOS) || "an unknown OS";
  	},
  	searchString: function (data) {
  		for (var i=0;i<data.length;i++)	{
  			var dataString = data[i].string;
  			var dataProp = data[i].prop;
  			this.versionSearchString = data[i].versionSearch || data[i].identity;
  			if (dataString) {
  				if (dataString.indexOf(data[i].subString) != -1)
  					return data[i].identity;
  			}
  			else if (dataProp)
  				return data[i].identity;
  		}
  	},
  	searchVersion: function (dataString) {
  		var index = dataString.indexOf(this.versionSearchString);
  		if (index == -1) return;
  		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
  	},
  	dataBrowser: [
  		{ 	string: navigator.userAgent,
  			subString: "OmniWeb",
  			versionSearch: "OmniWeb/",
  			identity: "OmniWeb"
  		},
  		{
  			string: navigator.vendor,
  			subString: "Apple",
  			identity: "Safari"
  		},
  		{
  			prop: window.opera,
  			identity: "Opera"
  		},
  		{
  			string: navigator.vendor,
  			subString: "iCab",
  			identity: "iCab"
  		},
  		{
  			string: navigator.vendor,
  			subString: "KDE",
  			identity: "Konqueror"
  		},
  		{
  			string: navigator.userAgent,
  			subString: "Firefox",
  			identity: "Firefox"
  		},
  		{
  			string: navigator.vendor,
  			subString: "Camino",
  			identity: "Camino"
  		},
  		{		// for newer Netscapes (6+)
  			string: navigator.userAgent,
  			subString: "Netscape",
  			identity: "Netscape"
  		},
  		{
  			string: navigator.userAgent,
  			subString: "MSIE",
  			identity: "Explorer",
  			versionSearch: "MSIE"
  		},
  		{
  			string: navigator.userAgent,
  			subString: "Gecko",
  			identity: "Mozilla",
  			versionSearch: "rv"
  		},
  		{ 		// for older Netscapes (4-)
  			string: navigator.userAgent,
  			subString: "Mozilla",
  			identity: "Netscape",
  			versionSearch: "Mozilla"
  		}
  	],
  	dataOS : [
  		{
  			string: navigator.platform,
  			subString: "Win",
  			identity: "Windows"
  		},
  		{
  			string: navigator.platform,
  			subString: "Mac",
  			identity: "Mac"
  		},
  		{
  			string: navigator.platform,
  			subString: "Linux",
  			identity: "Linux"
  		}
  	]
  
  };
  BrowserDetect.init();
  return BrowserDetect;
}