var imageFiles_166_21 = new Array();
imageFiles_166_21['0'] = new Array ('_images/166_.gif', '_images/166_Mouseover.gif');

function image_on_166_21 (position) {
   var doc = eval("document.image166_21" + position);
   doc.src = imageFiles_166_21[position][1];
}

function image_off_166_21 (position) {
   var doc = eval("document.image166_21" + position);
   doc.src = imageFiles_166_21[position][0];
}