function MM_swapImgRestore() { //v2.0
  if (document.MM_swapImgData != null)
    for (var i=0; i<(document.MM_swapImgData.length-1); i+=2)
      document.MM_swapImgData[i].src = document.MM_swapImgData[i+1];
}

function MM_preloadImages() { //v2.0
   if (document.images) {
      var imgFiles = MM_preloadImages.arguments;
      if (document.preloadArray == null)
         document.preloadArray = new Array();
      var i = document.preloadArray.length;
      with (document)
         for (var j=0; j<imgFiles.length; j++) 
            if (imgFiles[j].charAt(0)!="#") {
               preloadArray[i] = new Image;
               preloadArray[i++].src = imgFiles[j];
            }
   } // if (document.images)
}

// MM_swapImage('document.about','document.about','../images/deptnav_about_ov.gif','#942596222633')

function MM_swapImage() { //v2.0
   var i, j=0, objStr, obj, swapArray=new Array, oldArray = document.MM_swapImgData;
   for (i=0; i < (MM_swapImage.arguments.length-2); i+=3) {
      objStr = MM_swapImage.arguments[(navigator.appName == 'Netscape') ? i : i+1];
      if ((objStr.indexOf('document.layers[') == 0 && document.layers == null) ||
        (objStr.indexOf('document.all[') == 0 && document.all == null))
         objStr = 'document'+objStr.substring(objStr.lastIndexOf('.'),objStr.length);
      obj = eval(objStr);
      if (obj != null) {
         swapArray[j++] = obj;
         swapArray[j++] = (oldArray==null || oldArray[j-1] != obj) ? obj.src : oldArray[j];
         obj.src = MM_swapImage.arguments[i+2];
      }
   } // for (i=0; i < (MM_swapImage.arguments.length-2); i+=3) {
   document.MM_swapImgData = swapArray; //used for restore
}