Keep an html5-canvas element resized across the whole browser window

jquery.fullscreenCanvas.js

jQuery.fn.fullscreenCanvas = function() {
  var els=this;
  $(window).resize(function() {
    els
      .css({position:"fixed",left:0,top:0})
      .attr("width",$(window).width())
      .attr("height",$(window).height())
    ;
  });
  return this;
};