var imageFiles_7y_15 = new Array();
imageFiles_7y_15['0'] = new Array ('_images/7y_.gif', '_images/7y_Mouseover.gif');

function image_on_7y_15 (position) {
   var doc = eval("document.image7y_15" + position);
   doc.src = imageFiles_7y_15[position][1];
}

function image_off_7y_15 (position) {
   var doc = eval("document.image7y_15" + position);
   doc.src = imageFiles_7y_15[position][0];
}