var imageFiles_18_21 = new Array();
imageFiles_18_21['0'] = new Array ('_images/18_Map_to_Office_.gif', '_images/18_Map_to_Office_Mouseover.gif');
imageFiles_18_21['1'] = new Array ('_images/18_Testimonials_.gif', '_images/18_Testimonials_Mouseover.gif');
imageFiles_18_21['2'] = new Array ('_images/18_Nutri_physical_.gif', '_images/18_Nutri_physical_Mouseover.gif');
imageFiles_18_21['3'] = new Array ('_images/18_Buy_Supplements.gif', '_images/18_Buy_SupplementsMouseover.gif');
imageFiles_18_21['4'] = new Array ('_images/18_Products.gif', '_images/18_ProductsMouseover.gif');
imageFiles_18_21['5'] = new Array ('_images/18_Weight_Loss.gif', '_images/18_Weight_LossMouseover.gif');
imageFiles_18_21['6'] = new Array ('_images/18_Whiplash.gif', '_images/18_WhiplashMouseover.gif');

function image_on_18_21 (position) {
   var doc = eval("document.image18_21" + position);
   doc.src = imageFiles_18_21[position][1];
}

function image_off_18_21 (position) {
   var doc = eval("document.image18_21" + position);
   doc.src = imageFiles_18_21[position][0];
}