var imageFiles_4_31 = new Array();
imageFiles_4_31['0'] = new Array ('_images/4_About.gif', '_images/4_AboutMouseover.gif');
imageFiles_4_31['1'] = new Array ('_images/4_Open_Testing.gif', '_images/4_Open_TestingMouseover.gif');
imageFiles_4_31['2'] = new Array ('_images/4_Lodging.gif', '_images/4_LodgingMouseover.gif');
imageFiles_4_31['3'] = new Array ('_images/4_Directions.gif', '_images/4_DirectionsMouseover.gif');
imageFiles_4_31['4'] = new Array ('_images/4_Contacts.gif', '_images/4_ContactsMouseover.gif');
imageFiles_4_31['5'] = new Array ('_images/4_Photos.gif', '_images/4_PhotosMouseover.gif');
imageFiles_4_31['6'] = new Array ('_images/4_Racing_Links.gif', '_images/4_Racing_LinksMouseover.gif');

function image_on_4_31 (position) {
   var doc = eval("document.image4_31" + position);
   doc.src = imageFiles_4_31[position][1];
}

function image_off_4_31 (position) {
   var doc = eval("document.image4_31" + position);
   doc.src = imageFiles_4_31[position][0];
}