var imageFiles_b5_7 = new Array();
imageFiles_b5_7['0'] = new Array ('_images/b5_Advertising.gif', '_images/b5_AdvertisingMouseover.gif');

function image_on_b5_7 (position) {
   var doc = eval("document.imageb5_7" + position);
   doc.src = imageFiles_b5_7[position][1];
}

function image_off_b5_7 (position) {
   var doc = eval("document.imageb5_7" + position);
   doc.src = imageFiles_b5_7[position][0];
}