Make sure images are loaded with the "load" event

load.js

var img = jQuery("<img>")
  .attr("src", "img.png")
  .bind("load", function () {
    var interval = setInterval(function () {
      if (img[0].complete) {
        doTheRestOfYourStuffThatUsesThisImgButDontForgetToClearThisInterval();
      }
    }, 100);
  });

The load event works, except in IE. IE fires the load event before the image is loaded, so you have to do this janky stuff to make sure it's actually loaded.