var imageFiles_1_3 = new Array();
imageFiles_1_3['0'] = new Array ('_images/1_Home__.gif', '_images/1_Home__Mouseover.gif');
imageFiles_1_3['1'] = new Array ('_images/1_About_Us_.gif', '_images/1_About_Us_Mouseover.gif');
imageFiles_1_3['2'] = new Array ('_images/1_Contact.gif', '_images/1_ContactMouseover.gif');
imageFiles_1_3['3'] = new Array ('_images/1_Build_it__.gif', '_images/1_Build_it__Mouseover.gif');

function image_on_1_3 (position) {
   var doc = eval("document.image1_3" + position);
   doc.src = imageFiles_1_3[position][1];
}

function image_off_1_3 (position) {
   var doc = eval("document.image1_3" + position);
   doc.src = imageFiles_1_3[position][0];
}