var imageFiles_5a_31 = new Array();
imageFiles_5a_31['0'] = new Array ('_images/5a_CONTACT_US.gif', '_images/5a_CONTACT_USMouseover.gif');

function image_on_5a_31 (position) {
   var doc = eval("document.image5a_31" + position);
   doc.src = imageFiles_5a_31[position][1];
}

function image_off_5a_31 (position) {
   var doc = eval("document.image5a_31" + position);
   doc.src = imageFiles_5a_31[position][0];
}