var imageFiles_8_13 = new Array();
imageFiles_8_13['0'] = new Array ('_images/8_Home.gif', '_images/8_HomeMouseover.gif');
imageFiles_8_13['1'] = new Array ('_images/8_Contact_Us.gif', '_images/8_Contact_UsMouseover.gif');
imageFiles_8_13['2'] = new Array ('_images/8_Certification.gif', '_images/8_CertificationMouseover.gif');
imageFiles_8_13['3'] = new Array ('_images/8_Education.gif', '_images/8_EducationMouseover.gif');
imageFiles_8_13['4'] = new Array ('_images/8_Satisfied_Customers.gif', '_images/8_Satisfied_CustomersMouseover.gif');

function image_on_8_13 (position) {
   var doc = eval("document.image8_13" + position);
   doc.src = imageFiles_8_13[position][1];
}

function image_off_8_13 (position) {
   var doc = eval("document.image8_13" + position);
   doc.src = imageFiles_8_13[position][0];
}