var imageFiles_1a_1 = new Array();
imageFiles_1a_1['0'] = new Array ('_images/1a_Home.gif', '_images/1a_HomeMouseover.gif');
imageFiles_1a_1['1'] = new Array ('_images/1a_Our_Services.gif', '_images/1a_Our_ServicesMouseover.gif');
imageFiles_1a_1['2'] = new Array ('_images/1a_Contact_Us.gif', '_images/1a_Contact_UsMouseover.gif');

function image_on_1a_1 (position) {
   var doc = eval("document.image1a_1" + position);
   doc.src = imageFiles_1a_1[position][1];
}

function image_off_1a_1 (position) {
   var doc = eval("document.image1a_1" + position);
   doc.src = imageFiles_1a_1[position][0];
}