function getSilverlightVersion() {
    var version = 'none';
    var container = null;
    try {
        var control = null;
        if (window.ActiveXObject) {
            control = new ActiveXObject('AgControl.AgControl');
        }
        else {
            if (navigator.plugins['Silverlight Plug-In']) {
                container = document.createElement('div');
                document.body.appendChild(container);
                container.innerHTML = '<embed type="application/x-silverlight" src="data:," />';
                control = container.childNodes[0];
            }
        }
        if (control) {
	    if (control.isVersionSupported('4.0')) { version = 'Silverlight/4.0'; }
            else if (control.isVersionSupported('3.0')) { version = 'Silverlight/3.0'; }
	    else if (control.isVersionSupported('2.0')) { version = 'Silverlight/2.0'; }
            else if (control.isVersionSupported('1.0')) { version = 'Silverlight/1.0'; }
        }
    }
    catch (e) { }
    if (container) {
        document.body.removeChild(container);
    }
    return version;
}