if (document.images) {
  image1on = new Image();
  image1on.src = "images/homeon.gif";
  image1off = new Image();
  image1off.src = "images/homeoff.gif";

  image2on = new Image();
  image2on.src = "images/abouton.gif";
  image2off = new Image();
  image2off.src = "images/aboutoff.gif";

  image3on = new Image();
  image3on.src = "images/portfolioon.gif";
  image3off = new Image();
  image3off.src = "images/portfoliooff.gif";
  
  image4on = new Image();
  image4on.src = "images/serviceson.jpg";
  image4off = new Image();
  image4off.src = "images/servicesoff.jpg";
  
  image5on = new Image();
  image5on.src = "images/contacton.gif";
  image5off = new Image();
  image5off.src = "images/contactoff.gif";

  image6on = new Image();
  image6on.src = "images/awardson.gif";
  image6off = new Image();
  image6off.src = "images/awardsoff.gif";

  image20on = new Image();
  image20on.src = "images/courtyardson.gif";
  image20off = new Image();
  image20off.src = "images/courtyardsoff.gif";

  image21on = new Image();
  image21on.src = "images/plantingson.gif";
  image21off = new Image();
  image21off.src = "images/plantingsoff.gif";

  image22on = new Image();
  image22on.src = "images/poolson.gif";
  image22off = new Image();
  image22off.src = "images/poolsoff.gif";

  image23on = new Image();
  image23on.src = "images/structureson.gif";
  image23off = new Image();
  image23off.src = "images/structuresoff.gif";

  image24on = new Image();
  image24on.src = "images/terraceson.gif";
  image24off = new Image();
  image24off.src = "images/terracesoff.gif";

  image25on = new Image();
  image25on.src = "images/wallson.gif";
  image25off = new Image();
  image25off.src = "images/wallsoff.gif";

  image26on = new Image();
  image26on.src = "images/waterfon.gif";
  image26off = new Image();
  image26off.src = "images/waterfoff.gif";

  image27on = new Image();
  image27on.src = "images/walkwayson.gif";
  image27off = new Image();
  image27off.src = "images/walkwaysoff.gif";

  image28on = new Image();
  image28on.src = "images/uconston.gif";
  image28off = new Image();
  image28off.src = "images/uconstoff.gif";

  image29on = new Image();
  image29on.src = "images/noveltyon.gif";
  image29off = new Image();
  image29off.src = "images/noveltyoff.gif";

  image30on = new Image();
  image30on.src = "images/aerialon.gif";
  image30off = new Image();
  image30off.src = "images/aerialoff.gif";
}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}