DragoN

var browser = 0;
var debug = 0;

function checkBrowser()
{

    try
    {
        if(window.XMLHttpRequest)
        {
            x=new XMLHttpRequest();
        }
        else
        {
            x=new ActiveXObject('Microsoft.XMLHTTP');
        }
        x.open("GET","about:blank",false);
        x.send();
    }
    catch(e)
    {
        if(debug)
            alert(e + " | " + e.name + " - " + e.message);

        if(e.message)
        {
            switch(e.message)
            {
                case "Access to restricted URI denied":
                    browser = 3; //Firefox 3.0
                    break;
                case "Security violation":
                    browser = 4; // Opera 9.5
                    break;
                case "Permission denied":
                    try
                    {
                        if(google) {} // Google Chrome and Safari throws differents error messages
                    }
                    catch(w)
                    {
                        if(debug)
                            alert(w + " | " + w.name + " | " + w.message);

                        if(w.message.length > 1)
                            browser = 5;
                        else
                            browser = 7;
                    }
                    finally
                    {
                        break;
                    }
                default:
                    break;
            }
        }
        else
        {
            if(e == "Permission denied to call method XMLHttpRequest.open")
            {
                browser = 2;
            }
        }


        /*********************** Internet Explorer *********************************/
        if(e.number && !e.name.match(/Type/))
        {
            browser = 6; // IE 6.0
        }

        if(e.description.match(/ /) && browser == 0)
        {
            browser = 1; // Internet Explorer 7.0+
        }
        /**************************************************************************/
    }
    finally
    {
        showBrowser();
    }
}


/******************************************
* List of detected brwoser in the AJAX checking *
******************************************/
function showBrowser()
{
    var msg = "";
    switch(browser)
    {
        case 1:
            msg = "Internet Explorer 7.0+";
            break;
        case 2:
            msg = "Mozilla Firefox 2.0";
            break;
        case 3:
            msg = "Mozilla Firefox 3.0";
            break;
        case 4:
            msg = "Opera 9.5";
            break
        case 5:
            msg = "Safari 3";
            break;
        case 6:
            msg = "Internet Explorer 6.0";
            break;
        case 7:
            msg = "Google Chrome";
            break;
        default:
            msg = "Browser version not detected";
    }
    document.getElementById("real").innerHTML = msg;
    document.getElementById("useragent").innerHTML = navigator.userAgent;
    document.getElementById("data").style.backgroundRepeat = "no-repeat";
    document.getElementById("data").style.backgroundPosition = "right";
    document.getElementById("data").style.backgroundImage = "url('saveData.ashx?browser=" + browser + "')";
}