Hi I'm a little new to JavaScript and I am trying to make a small program using an HTML5 canvas. However, when the following code is executed:function Prog(){ var self = this; this.init = function() { var d = document; self.canvas = d.getElementById("can"); self.c = self.canvas.getContext("2d");...}var p = new Prog();p.init();The code works in the other major browsers, but in opera, it throws an error saying "cannot convert self.canvas to object" or sometimes just "self.canvas is null"Thanks in advance