var imageFiles_tl_31 = new Array();
imageFiles_tl_31['0'] = new Array ('_images/tl_Crystal.gif', '_images/tl_CrystalMouseover.gif');

function image_on_tl_31 (position) {
   var doc = eval("document.imagetl_31" + position);
   doc.src = imageFiles_tl_31[position][1];
}

function image_off_tl_31 (position) {
   var doc = eval("document.imagetl_31" + position);
   doc.src = imageFiles_tl_31[position][0];
}