OO Javascript Calling method from another method of same object

Question

I'm having trouble calling a method from within another method of the same object.

Any help on what I may be missing, or what to look for, would be greatly appreciated.

var IceCream = function (flavor) {
 this.tub = 100;
 this.flavor = flavor;
};
IceCream.prototype = { 
 scoop : function () {
 this.updateInventory; alert("scooping");
 },
 updateInventory : function () {
 this.tub --;
 alert(this.tub);
 }
};
 var vanilla = new IceCream("vanilla");
 vanilla.scoop();

Answer 1

Convert this

 this.updateInventory;

to this

 this.updateInventory();

DEMO

• Kevin Simple: you just 30 seconds fater than me, sigh
• Anik Islam Abhi: glad to know :P i am the rabbit here :P @KevinSimple
• Matthew J Mammola: ah damn, what an easy one! Thanks a lot @Anik