var imageFiles_ng_13 = new Array();
imageFiles_ng_13['0'] = new Array ('_images/ng_D_R_E____Teacher_Resources.gif', '_images/ng_D_R_E____Teacher_ResourcesMouseover.gif');

function image_on_ng_13 (position) {
   var doc = eval("document.imageng_13" + position);
   doc.src = imageFiles_ng_13[position][1];
}

function image_off_ng_13 (position) {
   var doc = eval("document.imageng_13" + position);
   doc.src = imageFiles_ng_13[position][0];
}