/**Java script - to detect the type of browsers the users are using
   it displays a message saying that users without IE or Firefox cannot view this site
   Developed by Joseph Mifsud 16/02/2007
   Reference http://www.quirksmode.org/js/detect.html
   Modified [070905] - DA
    Changed to a proper javascript class using prototype keyword
    Removed init and alerts at the bottom of the file, these should be run on the particular change
    Dependency: Prototype 1.6

**/
var BrowserDetect=Class.create(); //This var is thus a global

BrowserDetect.prototype=
{
    initialize: 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;
        }
    },
    getBrowserAndVersion: function ()
    {
		return this.browser + ' ' + this.version;
    },
    toString: function ()
    {
		alert(this.browser + ' ' + this.version + ' ' + this.OS);
    },
    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"
		}
	]
} //End class