var imageFiles_16_13 = new Array();
imageFiles_16_13['0'] = new Array ('_images/16_Home.gif', '_images/16_HomeMouseover.gif');
imageFiles_16_13['1'] = new Array ('_images/16_Shop_Online.gif', '_images/16_Shop_OnlineMouseover.gif');
imageFiles_16_13['2'] = new Array ('_images/16_Treatments.gif', '_images/16_TreatmentsMouseover.gif');
imageFiles_16_13['3'] = new Array ('_images/16_Vouchers.gif', '_images/16_VouchersMouseover.gif');
imageFiles_16_13['4'] = new Array ('_images/16_Book_an_Appointment.gif', '_images/16_Book_an_AppointmentMouseover.gif');
imageFiles_16_13['5'] = new Array ('_images/16_Contact_Us.gif', '_images/16_Contact_UsMouseover.gif');
imageFiles_16_13['6'] = new Array ('_images/16_Enquiry_Form.gif', '_images/16_Enquiry_FormMouseover.gif');

function image_on_16_13 (position) {
   var doc = eval("document.image16_13" + position);
   doc.src = imageFiles_16_13[position][1];
}

function image_off_16_13 (position) {
   var doc = eval("document.image16_13" + position);
   doc.src = imageFiles_16_13[position][0];
}