<!--
if (document.images) {

        //Previous
  image1on = new Image();
  image1on.src = "http://i.t.com.com/i/z/200608/tr_preview/bt_previous_on.gif";

  image1off = new Image();
  image1off.src = "http://i.t.com.com/i/z/200608/tr_preview/bt_previous_off.gif";

        //Next
  image2on = new Image();
  image2on.src = "http://i.t.com.com/i/z/200608/tr_preview/bt_next_on.gif";

  image2off = new Image();
  image2off.src = "http://i.t.com.com/i/z/200608/tr_preview/bt_next_off.gif";  

}
function turnOn(imageName) {
  if (document.images) {
                document[imageName].src = eval(imageName + "on.src");
  }
}
function turnOff(imageName) {
  if (document.images) {
    document[imageName].src = eval(imageName + "off.src");
  }
}
// -->