Calling a class prototype method by a setInterval event

Question

I have a simple javascript class.

One method of this class sets up a timer using setInterval function. The method that I want to call every time the event fires is

Answer 1

setInterval can take a function directly, not just a string. https://developer.mozilla.org/en/DOM/window.setInterval

i.e.

loadingTimer = setInterval(showLoading, 100);

But, for optimal browser compatibility, you should use a closure with an explicit reference:

 var t = this;
 loadingTimer = setInterval(function(){t.showLoading();}, 100);