var imgRolloverLastOver = new Image()
  imgRolloverLastOver.src = '../last_over.gif';
var imgRolloverLastOut = new Image()
  imgRolloverLastOut.src = '../last_down.gif';

function onRolloverLastOver() {
  document.RolloverLast.src=imgRolloverLastOver.src;
}
function onRolloverLastOut() {
  document.RolloverLast.src=imgRolloverLastOut.src;
}
 
var imgRolloverTopOver = new Image()
  imgRolloverTopOver.src = '../top_over.gif';
var imgRolloverTopOut = new Image()
  imgRolloverTopOut.src = '../top_down.gif';

function onRolloverTopOver() {
  document.RolloverTop.src=imgRolloverTopOver.src;
}
function onRolloverTopOut()  {
  document.RolloverTop.src=imgRolloverTopOut.src;
}
 
var imgRolloverNextOver = new Image()
  imgRolloverNextOver.src = '../next_over.gif';
var imgRolloverNextOut = new Image()
  imgRolloverNextOut.src = '../next_down.gif';

function onRolloverNextOver() {
  document.RolloverNext.src=imgRolloverNextOver.src;
}
function onRolloverNextOut() {
  document.RolloverNext.src=imgRolloverNextOut.src;
}