var imageFiles_4h_31 = new Array();
imageFiles_4h_31['0'] = new Array ('_images/4h_Home__.gif', '_images/4h_Home__Mouseover.gif');
imageFiles_4h_31['1'] = new Array ('_images/4h_About_Us__.gif', '_images/4h_About_Us__Mouseover.gif');
imageFiles_4h_31['2'] = new Array ('_images/4h_Contact_Us.gif', '_images/4h_Contact_UsMouseover.gif');

function image_on_4h_31 (position) {
   var doc = eval("document.image4h_31" + position);
   doc.src = imageFiles_4h_31[position][1];
}

function image_off_4h_31 (position) {
   var doc = eval("document.image4h_31" + position);
   doc.src = imageFiles_4h_31[position][0];
}