if(document.images) {
  img1on = new Image();
  img1on.src ="/images/ordera.jpg";
  img1off = new Image();
  img1off.src = "/images/orderp.jpg";
  img1click = new Image();
  img1click.src = "/images/orderc.jpg";

  img2on = new Image();
  img2on.src ="/images/indexa.jpg";
  img2off = new Image();
  img2off.src = "/images/indexp.jpg";
  img2click = new Image();
  img2click.src = "/images/indexc.jpg";

  img3on = new Image();
  img3on.src ="/images/servicesa.jpg";
  img3off = new Image();
  img3off.src = "/images/servicesp.jpg";
  img3click = new Image();
  img3click.src = "/images/servicesc.jpg";

  img4on = new Image();
  img4on.src ="/images/portfolioa.jpg";
  img4off = new Image();
  img4off.src = "/images/portfoliop.jpg";
  img4click = new Image();
  img4click.src = "/images/portfolioc.jpg";

  img5on = new Image();
  img5on.src ="/images/partnersa.jpg";
  img5off = new Image();
  img5off.src = "/images/partnersp.jpg";
  img5click = new Image();
  img5click.src = "/images/partnersc.jpg";

  img6on = new Image();
  img6on.src ="/images/contactsa.jpg";
  img6off = new Image();
  img6off.src = "/images/contactsp.jpg";
  img6click = new Image();
  img6click.src = "/images/contactsc.jpg";
}

function imgOn(imgName)
  {
    if(document.images)
      { document[imgName].src = eval(imgName + "on.src"); }
  }

function imgOff(imgName)
  {
    if(document.images)
      { document[imgName].src = eval(imgName + "off.src"); }
  }

function imgClick(imgName)
  {
    if(document.images)
      { document[imgName].src = eval(imgName + "click.src"); }
  }