Ext.onReady(function() {

  var VUBrowserDetect = {
	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));
	},
	checkCompatibility: function() {
	  if(!this.checkForCookie("BrowserChecked")) {
		this.init();
		this.addCookie("BrowserChecked", this.OS);
		//alert('You are using ' + BrowserDetect.browser + ' ' + BrowserDetect.version + ' on ' + BrowserDetect.OS + '!');
		if((this.browser != "Explorer" && this.browser != "Firefox") ||
		   (this.browser == "Explorer" && parseInt(this.version) < 7.0) ||
		   (this.browser == "Firefox" && parseInt(this.version) < 2.0)) {
		  var width = 640;
		  var height = 380;
		  var left = parseInt((screen.availWidth/2) - (width/2));
		  var top = parseInt((screen.availHeight/2) - (height/2));
		  var features = "width=" + width + ",height=" + height + ",left=" + left + ",top=" + top;
		  //alert("window features = " + features);
		  window.open('http://www.villanova.edu/unit/includes/browser.htm',"BrowserOptions",features);
		}
	  }
	},
	addCookie: function(cookie_name, platform) {
	  document.cookie = cookie_name + "=" + platform;
	},
	checkForCookie: function(cookie_name) {
	  var index = -1;
	  if(document.cookie.length > 0) {
		index = document.cookie.indexOf(cookie_name);
	  }
	  return index < 0 ? false : true;
	},
	dataBrowser: [
		{
			string: navigator.userAgent,
			subString: "Chrome",
			identity: "Chrome"
		},
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb/",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari",
			versionSearch: "Version"
		},
		{
			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.userAgent,
			   subString: "iPhone",
			   identity: "iPhone/iPod"
	    },
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

  };

  VUBrowserDetect.checkCompatibility();
  
});