var preloadImages = function() {
  for (var i = 0; i < arguments.length; i++) {
    $("<img>").attr("src", arguments[i]);
  }
};

$(document).ready(function() {
  $("a").focus(function() {
    $(this).get(0).hideFocus = true;
  });
  preloadImages(
        "Resources/Navigation-About-Us-Hover.jpg",
        "Resources/Navigation-Portfolio-Hover.jpg",
        "Resources/Navigation-Modelling-Hover.jpg",
        "Resources/Navigation-Surveying-Hover.jpg",
        "Resources/Navigation-Contact-Us-Hover.jpg",
        "Resources/Navigation-About-Us-Next.jpg",
        "Resources/Navigation-Portfolio-Next.jpg",
        "Resources/Navigation-Modelling-Next.jpg",
        "Resources/Navigation-Surveying-Next.jpg",
        "Resources/Navigation-About-Us-Next-Hover.jpg",
        "Resources/Navigation-Portfolio-Next-Hover.jpg",
        "Resources/Navigation-Modelling-Next-Hover.jpg",
        "Resources/Navigation-Surveying-Next-Hover.jpg",
        "Resources/Navigation-About-Us-Active.jpg",
        "Resources/Navigation-Portfolio-Active.jpg",
        "Resources/Navigation-Modelling-Active.jpg",
        "Resources/Navigation-Surveying-Active.jpg",
        "Resources/Navigation-Contact-Us-Active.jpg"
  );
});

$.fn.idle = function(time, callback) {
  var i = $(this);
  i.queue(function() { setTimeout(function() { i.dequeue(); callback(i); }, time); });
};