var imageFiles_tl_13 = new Array();
imageFiles_tl_13['0'] = new Array ('_images/tl_Crystal.gif', '_images/tl_CrystalMouseover.gif');

function image_on_tl_13 (position) {
   var doc = eval("document.imagetl_13" + position);
   doc.src = imageFiles_tl_13[position][1];
}

function image_off_tl_13 (position) {
   var doc = eval("document.imagetl_13" + position);
   doc.src = imageFiles_tl_13[position][0];
}