function detectSilverlight (b) {
    
    if (b == undefined) 
        b = null;
    
    var a = false, m = null;
    try {
        var i = null, j = false;
        if (window.ActiveXObject) try {
            i = new ActiveXObject("AgControl.AgControl");
            if (b === null) a = true;
            else if (i.IsVersionSupported(b)) a = true;
            i = null
        } catch (l) { j = true } else j = true;
        if (j) {
            var k = navigator.plugins["Silverlight Plug-In"];
            if (k) if (b === null) a = true;
            else {
                var h = k.description;
                if (h === "1.0.30226.2") h = "2.0.30226.2";
                var c = h.split(".");
                while (c.length > 3) c.pop();
                while (c.length < 4) c.push(0);
                var e = b.split(".");
                while (e.length > 4) e.pop();
                var d, g, f = 0;
                do {
                    d = parseInt(e[f]);
                    g = parseInt(c[f]);
                    f++
                } while (f < e.length && d === g);
                if (d <= g && !isNaN(d)) a = true
            } 
        } 
    } catch (l) { a = false } return a
}