// define images

if(document.images) {

  image11 = new Image;
  image12 = new Image;
  image21 = new Image;
  image22 = new Image;
  image31 = new Image;
  image32 = new Image;
  image41 = new Image;
  image42 = new Image;
  image51 = new Image;
  image52 = new Image;
  image61 = new Image;
  image62 = new Image;


// source images

  image11.src = "img/btchisiamo.gif";
  image12.src = "img/btchisiamoa.gif";
  image21.src = "img/btprodotti.gif";
  image22.src = "img/btprodottia.gif";
  image31.src = "img/btservizi.gif";
  image32.src = "img/btservizia.gif";
  image41.src = "img/btinfo.gif";
  image42.src = "img/btinfoa.gif";
  image51.src = "img/btpromozioni.gif";
  image52.src = "img/btpromozionia.gif";
  image61.src = "img/btdvsiamo.gif";
  image62.src = "img/btdvsiamoa.gif";

}

// MouseOver Function

function swapOn(imgLocation) {
  if(document.images) {
    document.images[imgLocation].src = eval(imgLocation + "2.src");
  }
}

// MouseOut Function

function swapOff(imgLocation) {
  if(document.images) {
    document.images[imgLocation].src = eval(imgLocation + "1.src");
  }
}