VS JavaScript intellisense with paramaters

SomeObjectType = function() {
}

SomeObjectType.prototype = {
    field1: null,
    field2: null
}

SomeOtherObject = function() {
}

SomeOtherObject.prototype =
{
    doSomething: function(val) {
        /// <param name="val" type="SomeObjectType"></param>
        var val2 = new SomeObjectType();
        //val2. shows intellisense correctly
        //val. does NOT


    }
}