var imageFiles_b6_13 = new Array();
imageFiles_b6_13['0'] = new Array ('_images/b6_Moving_Billboard.gif', '_images/b6_Moving_BillboardMouseover.gif');
imageFiles_b6_13['1'] = new Array ('_images/b6_I_D__IT__Plates.gif', '_images/b6_I_D__IT__PlatesMouseover.gif');

function image_on_b6_13 (position) {
   var doc = eval("document.imageb6_13" + position);
   doc.src = imageFiles_b6_13[position][1];
}

function image_off_b6_13 (position) {
   var doc = eval("document.imageb6_13" + position);
   doc.src = imageFiles_b6_13[position][0];
}