var imageFiles_yul1_23 = new Array();
imageFiles_yul1_23['0'] = new Array ('_images/yul1_Home.gif', '_images/yul1_HomeMouseover.gif');
imageFiles_yul1_23['1'] = new Array ('_images/yul1_About_Us.gif', '_images/yul1_About_UsMouseover.gif');
imageFiles_yul1_23['2'] = new Array ('_images/yul1_Contact_Us.gif', '_images/yul1_Contact_UsMouseover.gif');
imageFiles_yul1_23['3'] = new Array ('_images/yul1_STC.gif', '_images/yul1_STCMouseover.gif');
imageFiles_yul1_23['4'] = new Array ('_images/yul1_Catalog.gif', '_images/yul1_CatalogMouseover.gif');

function image_on_yul1_23 (position) {
   var doc = eval("document.imageyul1_23" + position);
   doc.src = imageFiles_yul1_23[position][1];
}

function image_off_yul1_23 (position) {
   var doc = eval("document.imageyul1_23" + position);
   doc.src = imageFiles_yul1_23[position][0];
}