No, but you can add properties onto a function, e.g.
function foo(){}
foo.myProperty = "whatever";
EDIT: to “make” an object callable, you’ll still have to do the above, but it might look something like:
// Augments func with object's properties
function makeCallable(object, func){
for(var prop in object){
if(object.hasOwnProperty(prop)){
func[prop] = object[prop];
}
}
}
And then you’d just use the “func” function instead of the object. Really all this method does is copy properties between two objects, but…it might help you.