var imageFiles_4rk_3 = new Array();
imageFiles_4rk_3['0'] = new Array ('_images/4rk_Contact_Us.gif', '_images/4rk_Contact_UsMouseover.gif');

function image_on_4rk_3 (position) {
   var doc = eval("document.image4rk_3" + position);
   doc.src = imageFiles_4rk_3[position][1];
}

function image_off_4rk_3 (position) {
   var doc = eval("document.image4rk_3" + position);
   doc.src = imageFiles_4rk_3[position][0];
}