Been working with HTML 5 recently and I ran into a very frustrating problem.

Using CSS to set the width and height of a canvas element stretches the content inside to the new width/height that you set.

Example 1 (will stretch):

	this.canvas.setAttribute('width', w);
	this.canvas.setAttribute('height', h);

To simply resize the area of the canvas element, do this:

	this.canvas.width = w;
	this.canvas.height = h;