function getSilverlightVersion() {
  var version = '';
  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;
}