I am trying to call the TAPI 3.1 MakeCall method from IE via JScript. 
According to the idl file, that method is in the ITRequest interface,
and according to the registry, that interface is available using the
ActiveX object name RequestMakeCall.RequestMakeCall.1.  I have loaded
that object, but it complains that that method name doesn't exist. 
What am I doing wrong?

function call(s)
{
    var obj = new ActiveXObject("RequestMakeCall.RequestMakeCall.1");
    alert(obj)
    obj.MakeCall(s, null, null, null)
}