Javascript self executing function “is not a function”

Question

I have:

var Init = (function() {
   my js goes here
})();

And my js executes correctly when the page is loaded. I also have:

Answer 1

You may try declaring it this way:

(function Init(){ 
    /*...*/ 
})();

But this will reduce usage of this function into it's body

Other way is to separate declaration from execution:

var Init = function(){
    /*...*/
    },
    initResult = (function(){ return Init(); })();