// Suppress error messages for the rollover script

  function noErrorMessages() {
     return true;
  }
  window.onerror = noErrorMessages;


// Preload images for the top navigation rollovers

   function preLoad() {

     if (document.images)  {
        img1a=new Image();    img2a=new Image();
        img1b=new Image();    img2b=new Image();
        img1c=new Image();    img2c=new Image();

        img3a=new Image();    img4a=new Image();
        img3b=new Image();    img4b=new Image();
        img3c=new Image();    img4c=new Image();

        img1a.src="images/home_off.gif";
        img1b.src="images/home_on.gif";
        img1c.src="images/home.gif";

        img2a.src="images/custom_off.gif";
        img2b.src="images/custom_on.gif";
        img2c.src="images/custom.gif";

        img3a.src="images/promotional_off.gif";
        img3b.src="images/promotional_on.gif";
        img3c.src="images/promotional.gif";

        img4a.src="images/about_off.gif";
        img4b.src="images/about_on.gif";
        img4c.src="images/about.gif";
     }
     loaded = true;
}


// Define the rollover functions

var selectButton = -1;
var temp = 0;


function imgOn(imgName) {
  if (document.images && loaded) {
    if (selectButton != imgName) {
     document.images[imgName].src = eval(imgName + "b.src");
    }
    return false;
  }
  return false;
}


function imgOff(imgName) {
  if (document.images && loaded) {
    if (selectButton != imgName) {
     document.images[imgName].src = eval(imgName + "a.src");
    }
    return false;
  }
  return false;
}

// This controls the on/off state of the clicked button

function clickButton(imgName) {
  if (document.images) {
     document.images[imgName].src = eval(imgName + "c.src");
     temp = selectButton;
     selectButton = imgName;
     if (temp != -1) {imgOff(temp)}
  }
}


window.onload = preLoad();