Getting Object Type On Mouse Event in AS3

Found this interesting. I've gotten used to checking object type, as run time. So, when I tried to figure out how to do it in AS3, I was surprised at some fairly convoluted approaches out there. Happily, the AS3 documentation came through, and I tried this out. Works like a charm, for my purposes.

function mouseOverListener(event:MouseEvent):void {

var targ = event.target;
trace("this: " + targ); // output is "[object Infopop]"
trace("type: " + targ.constructor); // output is "[class Infopop]"


if(targ.constructor == InfoPop){
trace("infopop");
}
}

For type checking, I want the constructor, not the object.

Update: Read the first comment on this post: very helpful!