// JScript File


    function imgSwap(imgID)
    {
       var sOver  = "_up";    
       var sOff = "_over";
       var oImg = document.getElementById(imgID);
       var sImg = oImg.src;
       if (sImg.indexOf(sOver) != -1){
          oImg.src = sImg.replace(sOver,sOff);
          }
       else
        {
          oImg.src = sImg.replace(sOff,sOver);
          }

    }