var imageFiles_yul1_4 = new Array();
imageFiles_yul1_4['0'] = new Array ('_images/yul1_Home.gif', '_images/yul1_HomeMouseover.gif');
imageFiles_yul1_4['1'] = new Array ('_images/yul1_About_Us.gif', '_images/yul1_About_UsMouseover.gif');
imageFiles_yul1_4['2'] = new Array ('_images/yul1_Contact_Us.gif', '_images/yul1_Contact_UsMouseover.gif');
imageFiles_yul1_4['3'] = new Array ('_images/yul1_Parents.gif', '_images/yul1_ParentsMouseover.gif');

function image_on_yul1_4 (position) {
   var doc = eval("document.imageyul1_4" + position);
   doc.src = imageFiles_yul1_4[position][1];
}

function image_off_yul1_4 (position) {
   var doc = eval("document.imageyul1_4" + position);
   doc.src = imageFiles_yul1_4[position][0];
}