var imageFiles_s2_1 = new Array();
imageFiles_s2_1['0'] = new Array ('_images/s2__.gif', '_images/s2__Mouseover.gif');

function image_on_s2_1 (position) {
   var doc = eval("document.images2_1" + position);
   doc.src = imageFiles_s2_1[position][1];
}

function image_off_s2_1 (position) {
   var doc = eval("document.images2_1" + position);
   doc.src = imageFiles_s2_1[position][0];
}