board01_off  = new Image(); board01_off.src = "/img/link1a.gif";
board02_off  = new Image(); board02_off.src = "/img/link2a.gif";
board03_off  = new Image(); board03_off.src = "/img/link3a.gif";
board04_off  = new Image(); board04_off.src = "/img/link4a.gif";
board05_off  = new Image(); board05_off.src = "/img/link5a.gif";
board06_off  = new Image(); board06_off.src = "/img/link6a.gif";
board07_off  = new Image(); board07_off.src = "/img/link7a.gif";
board08_off  = new Image(); board08_off.src = "/img/link8a.gif";
board09_off  = new Image(); board09_off.src = "/img/link9a.gif";
board10_off  = new Image(); board10_off.src = "/img/link10a.gif";
board11_off  = new Image(); board11_off.src = "/img/link11a.gif";
board12_off  = new Image(); board12_off.src = "/img/link12a.gif";
board13_off  = new Image(); board13_off.src = "/img/link13a.gif";
board14_off  = new Image(); board14_off.src = "/img/link14a.gif";
board15_off  = new Image(); board15_off.src = "/img/link15a.gif";
board16_off  = new Image(); board16_off.src = "/img/link16a.gif";
board17_off  = new Image(); board17_off.src = "/img/link17a.gif";
board18_off  = new Image(); board18_off.src = "/img/link18a.gif";
board19_off  = new Image(); board19_off.src = "/img/link19a.gif";
board20_off  = new Image(); board20_off.src = "/img/link20a.gif";

board01_on  = new Image(); board01_on.src  = "/img/link1b.gif";
board02_on  = new Image(); board02_on.src  = "/img/link2b.gif";
board03_on  = new Image(); board03_on.src  = "/img/link3b.gif";
board04_on  = new Image(); board04_on.src  = "/img/link4b.gif";
board05_on  = new Image(); board05_on.src  = "/img/link5b.gif";
board06_on  = new Image(); board06_on.src  = "/img/link6b.gif";
board07_on  = new Image(); board07_on.src  = "/img/link7b.gif";
board08_on  = new Image(); board08_on.src  = "/img/link8b.gif";
board09_on  = new Image(); board09_on.src  = "/img/link9b.gif";
board10_on  = new Image(); board10_on.src  = "/img/link10b.gif";
board11_on  = new Image(); board11_on.src  = "/img/link11b.gif";
board12_on  = new Image(); board12_on.src  = "/img/link12b.gif";
board13_on  = new Image(); board13_on.src  = "/img/link13b.gif";
board14_on  = new Image(); board14_on.src  = "/img/link14b.gif";
board15_on  = new Image(); board15_on.src  = "/img/link15b.gif";
board16_on  = new Image(); board16_on.src  = "/img/link16b.gif";
board17_on  = new Image(); board17_on.src  = "/img/link17b.gif";
board18_on  = new Image(); board18_on.src  = "/img/link18b.gif";
board19_on  = new Image(); board19_on.src  = "/img/link19b.gif";
board20_on  = new Image(); board20_on.src  = "/img/link20b.gif";


function act(S) 
{
  imgOn   = eval(S+"on.src");
  document[S].src = imgOn;
  return true;
}

function unact(S) 
{
  imgOff  = eval(S+"off.src");
  document[S].src = imgOff;
  return true;
}