var imageFiles_12_13 = new Array();
imageFiles_12_13['0'] = new Array ('_images/12_HOME.gif', '_images/12_HOMEMouseover.gif');
imageFiles_12_13['1'] = new Array ('_images/12_EQUIPMENT.gif', '_images/12_EQUIPMENTMouseover.gif');
imageFiles_12_13['2'] = new Array ('_images/12_CONTACT_US.gif', '_images/12_CONTACT_USMouseover.gif');
imageFiles_12_13['3'] = new Array ('_images/12_ABOUT_US.gif', '_images/12_ABOUT_USMouseover.gif');
imageFiles_12_13['4'] = new Array ('_images/12_SERVICES.gif', '_images/12_SERVICESMouseover.gif');

function image_on_12_13 (position) {
   var doc = eval("document.image12_13" + position);
   doc.src = imageFiles_12_13[position][1];
}

function image_off_12_13 (position) {
   var doc = eval("document.image12_13" + position);
   doc.src = imageFiles_12_13[position][0];
}