if (document.images) {

  image1on = new Image();
  image1on.src = "images/providers_on.gif";

  image2on = new Image();
  image2on.src = "images/facilities_on.gif";

  image3on = new Image();
  image3on.src = "images/servicearea_on.gif";

  image4on = new Image();
  image4on.src = "images/suggest_on.gif";

  image5on = new Image();
  image5on.src = "images/faq_on.gif";

  image6on = new Image();
  image6on.src = "images/contact_on.gif";

  image7on = new Image();
  image7on.src = "images/terms_on.gif";

  image8on = new Image();
  image8on.src = "images/specialties_on.gif";
  
  image9on = new Image();
  image9on.src = "images/home_on.gif";

  image10on = new Image();
  image10on.src = "images/memberlink_on.gif";

  image11on = new Image();
  image11on.src = "images/employerlink_on.gif";

  image12on = new Image();
  image12on.src = "images/brokerlink_on.gif";

  image13on = new Image();
  image13on.src = "images/providerlink_on.gif";

  image1off = new Image();
  image1off.src = "images/providers_off.gif";

  image2off = new Image();
  image2off.src = "images/facilities_off.gif";

  image3off = new Image();
  image3off.src = "images/servicearea_off.gif";

  image4off = new Image();
  image4off.src = "images/suggest_off.gif";

  image5off = new Image();
  image5off.src = "images/faq_off.gif";

  image6off = new Image();
  image6off.src = "images/contact_off.gif";

  image7off = new Image();
  image7off.src = "images/terms_off.gif";

  image8off = new Image();
  image8off.src = "images/specialties_off.gif";
  
  image9off = new Image();
  image9off.src = "images/home_off.gif";

  image10off = new Image();
  image10off.src = "images/memberlink_off.gif";

  image11off = new Image();
  image11off.src = "images/employerlink_off.gif";

  image12off = new Image();
  image12off.src = "images/brokerlink_off.gif";

  image13off = new Image();
  image13off.src = "images/providerlink_off.gif";
  
}

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

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