function newImage(arg)
{
  if (document.images) {
    rslt = new Image();
    rslt.src = arg;
    return rslt;
  }
}

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

var preloadFlag = false;

function preloadImages()
{
  if (document.images) {
    missionstatement_over = newImage("images/missionstatement-over.gif");
    contactinformation_over = newImage("images/contactinformation-over.gif");
    staff_over = newImage("images/staff-over.gif");
    projectlist_over = newImage("images/projectlist-over.gif");
    data_over = newImage("images/data-over.gif");
    dataapplications_over = newImage("images/dataapplications-over.gif");
    qc_over = newImage("images/qc_over.jpg");
    preloadImages_local();
    preloadFlag = true;
  }
}

function preloadImages_local()
{
}