gistfile1.txt

///////////////////////
//  Image Pre- Loading
///////////////////////
// Use a timeout so failing to preload image doesn't stop the page from loading
// Can pass 'false' for timeout to never timeout
function loadImages (images, callback, timeout) {
  var img, i, loaded = 0, total = images.length, called = false
  //console.log('loading images', images.length, images)

  if (timeout)  setTimeout(callCallback, timeout)

  for (i=0 ; i < total; i++) {
    img = new Image
    img.onload = onload
    img.src = images[i]
  }

  function onload () {
      loaded += 1
      console.log('loaded image %o of %o, %o', loaded, total, this.src)
      if (loaded === total)  callCallback()
  }
  function callCallback() {
      console.log('done loading images', images)
      if (!called)  callback()
      called = true
  }
}