if(document.images) {
  ftover = new Array(4);
  ftout = new Array(4);
  for(var n=1;n<=7;n++) {
    ftover[n]=new Image(70,22);
    ftout[n]=new Image(70,22);
    ftover[n].src="menu/"+n+"on.jpg";
    ftout[n].src="menu/"+n+"off.jpg";
    }
  }
  function tabOn(i) {
    if(document.images) document.images["ft"+i].src=ftover[i].src;
  }
  function tabOff(i) {
    if(document.images) document.images["ft"+i].src=ftout[i].src;
  }