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 defined inside the same class.

The question is, how can I pass this method as a parameter to the setInterval function?

One attempt was setInterval('this.showLoading(), 100). But doesn't work. This method access class properties, so I need the 'this' reference.

This is the sample code:

    function LoadingPicture(Id)

    {

        this.imgArray = null;

        this.currentImg = 0;

        this.elementId = Id;

        this.loadingTimer = null;

    }





   LoadingPicture.prototype.showLoading = function()

    {

        if(this.currentImg == imgArray.length)

            currentImg = 0;



        document.getElementById(this.elementId).src = imgArray[this.currentImg++].src;

    }





    LoadingPicture.prototype.StartLoading = function()

    {

        document.getElementById(this.elementId).style.visibility = visible;

        loadingTimer = setInterval(showLoading(), 100);

    }