var imageFiles_j3_1 = new Array();
imageFiles_j3_1['0'] = new Array ('_images/j3_USED.gif', '_images/j3_USEDMouseover.gif');

function image_on_j3_1 (position) {
   var doc = eval("document.imagej3_1" + position);
   doc.src = imageFiles_j3_1[position][1];
}

function image_off_j3_1 (position) {
   var doc = eval("document.imagej3_1" + position);
   doc.src = imageFiles_j3_1[position][0];
}