var imageFiles_18q_1 = new Array();
imageFiles_18q_1['0'] = new Array ('_images/18q_Cooling_System.gif', '_images/18q_Cooling_SystemMouseover.gif');

function image_on_18q_1 (position) {
   var doc = eval("document.image18q_1" + position);
   doc.src = imageFiles_18q_1[position][1];
}

function image_off_18q_1 (position) {
   var doc = eval("document.image18q_1" + position);
   doc.src = imageFiles_18q_1[position][0];
}