var imageFiles_ab_1 = new Array();
imageFiles_ab_1['0'] = new Array ('_images/ab_Advance_Boiler.gif', '_images/ab_Advance_BoilerMouseover.gif');
imageFiles_ab_1['1'] = new Array ('_images/ab_Advance_Thermotec.gif', '_images/ab_Advance_ThermotecMouseover.gif');

function image_on_ab_1 (position) {
   var doc = eval("document.imageab_1" + position);
   doc.src = imageFiles_ab_1[position][1];
}

function image_off_ab_1 (position) {
   var doc = eval("document.imageab_1" + position);
   doc.src = imageFiles_ab_1[position][0];
}