var imageFiles_2a_4 = new Array();
imageFiles_2a_4['0'] = new Array ('_images/2a_Party_Photos.gif', '_images/2a_Party_PhotosMouseover.gif');

function image_on_2a_4 (position) {
   var doc = eval("document.image2a_4" + position);
   doc.src = imageFiles_2a_4[position][1];
}

function image_off_2a_4 (position) {
   var doc = eval("document.image2a_4" + position);
   doc.src = imageFiles_2a_4[position][0];
}