/* Original code from http://www.quirksmode.org/js/detect.html */
var utlBrowserData = [
    {   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"
    }
];

var utlBrowserDataOS = [
    {
        string: navigator.platform,
        subString: "Win",
        identity: "Windows"
    },
    {
        string: navigator.platform,
        subString: "Mac",
        identity: "Mac"
    },
    {
        string: navigator.platform,
        subString: "Linux",
        identity: "Linux"
    }
];

function utlBrowserSearchString(data) 
{
    for (var i=0;i<data.length;i++) {
        var dataString = data[i].string;
        var dataProp = data[i].prop;
        if (dataString) {
            if (dataString.indexOf(data[i].subString) != -1)
                return i;
        }
        else if (dataProp)
            return i;
    }
}

function utlBrowserSearchVersion(dataString) 
{
    var i = utlBrowserSearchString(utlBrowserData);
    versionSearchString = data[i].versionSearch || data[i].identity;
    var index = dataString.indexOf(versionSearchString);
    if (index == -1) return;
    return parseFloat(dataString.substring(index+versionSearchString.length+1));
}

function utl_browserVersion()
{
    return utlBrowserSearchVersion(navigator.userAgent)
        || utlBrowserSearchVersion(navigator.appVersion)
        || "unknown";
}

function utl_browserOS()
{
    var i = utlBrowserSearchString(utlBrowserDataOS);
    return utlBrowserDataOS[i].identity || "unknown";
}

function utl_browserName() 
{
    var i = utlBrowserSearchString(utlBrowserData);
    return utlBrowserData[i].identity || "unknown";
}