var isMac = (navigator.userAgent.toLowerCase().indexOf('mac') != -1);
var isPC = (navigator.userAgent.toLowerCase().indexOf('windows') != -1);
var isIE = (navigator.userAgent.toLowerCase().indexOf('msie') != -1);
var isIE5 = (navigator.userAgent.toLowerCase().indexOf('msie 5.0') != -1);
var isIE55 = (navigator.userAgent.toLowerCase().indexOf('msie 5.5') != -1);
var isIE6 = (navigator.userAgent.toLowerCase().indexOf('msie 6.0') != -1);
var isPCIE5 = (isPC && isIE5);
var isPCIE6 = (isPC && isIE6);
var isFireFox = (navigator.userAgent.toLowerCase().indexOf('firefox') != -1);
var isSafari = (navigator.userAgent.toLowerCase().indexOf('safari') != -1);
var isMacIE = (isIE && isMac);


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.userAgent,
			subString: "Safari",
			identity: "Safari"
		},
		{
			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.userAgent,
			subString: "Windows NT 5",
			identity: "Windows XP"
		},
		{
			string: navigator.userAgent,
			subString: "Windows NT 6",
			identity: "Windows Vista"
		},
		
		{
			string: navigator.userAgent,
			subString: "Windows 98",
			identity: "Windows 98"
		},
		
		{
			string: navigator.userAgent,
			subString: "Win98",
			identity: "Windows 98"
		},
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows (Other)"
		},
		{
			string: navigator.userAgent,
			subString: "Mac OS X",
			identity: "Mac OS X"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac (Other)"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};

BrowserDetect.init();


function logFlashVersion(flashVersion){
	if (flashVersion != 0){
	var flashversionArray = flashVersion.split( "." );
	var majorVersion = flashversionArray[0];
	var minorVersion = flashversionArray[1];
	}
	else{
		var majorVersion = 0;
		var minorVersion = 0;
		}
	var os = BrowserDetect.OS;
	var browser = BrowserDetect.browser;
	var browserVersion = BrowserDetect.version;
	var screenWidth = screen.width;
	var screenHeight = screen.height;
	var usragt = navigator.userAgent;
	var qString = 'fmaj=' + majorVersion + '&fmin=' + minorVersion + '&os='+ os + '&b=' + browser + '&bvers=' + browserVersion + '&sw=' + screenWidth + '&sh=' + screenHeight + '&usragt=' + usragt.replace(/;/g, "|") + '&site=student';
	
	var xmlHttp = getHTTPObject();
	if (xmlHttp){
		var flogcookie = readCookie('flog');
		if ((!flogcookie) || (flogcookie > majorVersion)){
			sendGetRequest(xmlHttp, '/student/utilities/usragnt_logger.cfm?' + qString + '&uq=' + new Date().getTime());
		}
	}
	
	xmlHttp.onreadystatechange = function()
		{
			if (xmlHttp.readyState == 4){
				try{
					if (xmlHttp.status == 200){	
						createCookie('flog', majorVersion, 1000);								
					}				
					//This catch is to handle Firefox network connection exceptions
					} catch(err){	
						return false;
					}
			}
		}
}

function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}