if (document.images) {

	var back2On = new Image();
      back2On.src = "icons/back_on.gif";
      var back2Off = new Image();
      back2Off.src = "icons/back_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(\'back2\');" onmouseout="changeOut(\'back2\');" href="javascript:history.go(-1)"><img src="icons/back_off.gif" name="back2" border=0 width="96" height="28" vspace="1"></a>')