var imageFiles_bu_40 = new Array();
imageFiles_bu_40['0'] = new Array ('_images/bu_Celling.gif', '_images/bu_CellingMouseover.gif');

function image_on_bu_40 (position) {
   var doc = eval("document.imagebu_40" + position);
   doc.src = imageFiles_bu_40[position][1];
}

function image_off_bu_40 (position) {
   var doc = eval("document.imagebu_40" + position);
   doc.src = imageFiles_bu_40[position][0];
}