Test if an ActiveX control is installed with Javascript?

Question

Is there a way to test if an ActiveX control is installed using Javascript?

Answer 1

function AXOrNull(progId) {
  try {
    return new ActiveXObject(progId);
  }
  catch (ex) {
    return null;
  }
}

Answer 2

Solution, try to invoke a new ActiveXObject:

function testForActiveX(){
    tester = null;
    try {
        tester = new ActiveXObject('htmlfile');
    }
     catch (e) {
        // catch the exception
    }
    if (tester) {
        // ActiveX is installed
        return true;
    }
    return false;
}