/* Rollover */

  function imgHi(name){
    document.images[name].src="../images/"+name+"-a.gif";
  }
  function imgLo(name){
    document.images[name].src="../images/"+name+".gif";
  }
  function imgPreload(){
    for (i=0; i<document.images.length; i++){
      var a = new Image();
      loSrc = document.images[i].src; 
      hiSrc = loSrc.substring(0,loSrc.length-4)+"-a.gif";
      a.src = hiSrc;  
    }
  }