var stuck = new Image;
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 && obj != stuck) {
      swapArray[j++] = obj;
      swapArray[j++] = (oldArray==null || oldArray[j-1]!=obj)?obj.src:oldArray[j];
      obj.src = MM_swapImage.arguments[i+2];
  } }
  document.MM_swapImgData = swapArray; //used for restore
}

function FreezeImg(img) {
   var imgsrc;
   if (img != stuck) {
     // get the unstuck version of the currently stuck image
     if (stuck != null) {
       imgsrc = stuck.src;
       imgsrc = imgsrc.substr(0,imgsrc.lastIndexOf('.') - 1) + '1' + imgsrc.substr(imgsrc.lastIndexOf('.'),imgsrc.length);
     }
     // unstick the currently stuck image
     stuck.src = imgsrc;
     // mark the current image as stuck   
     stuck = img;
   }
}