if (document.images) {

	var topOn = new Image();
      topOn.src = "icons/top_on.gif";
      var topOff = new Image();
      topOff.src = "icons/top_off.gif";

}

function changeIn(imageName) {
      if (!document.images) return;
      document.images[imageName].src = eval(imageName + "On.src");
}

function changeOut(imageName) {
      if (!document.images) return;
      document.images[imageName].src = eval(imageName + "Off.src");
}


document.write('<a onmouseover="changeIn(\'top\');" onmouseout="changeOut(\'top\');" href="#top"><img src="icons/top_off.gif" name="top" border=0 width="96" height="28" vspace="1"></a>')