Here's a handy little plugin for jQuery to preload images on a webpage. Planning to use it on midhirrecords.com

imagePreload.js

$ = jQuery

// Takes an array of strings
$.preloadImages = function(images) {
  $(images).each(function() {
    $('<img />')[0].src = this;
  });
}

// Use it anytime after the document loads
$(document).ready(function() {
  $.preloadImages(['images/lolcat.jpg', 'images/awesome.jpg', 'images/logo.jpg']);
});