var imageFiles_7t_40 = new Array();
imageFiles_7t_40['0'] = new Array ('_images/7t_What_is_Leather.gif', '_images/7t_What_is_LeatherMouseover.gif');

function image_on_7t_40 (position) {
   var doc = eval("document.image7t_40" + position);
   doc.src = imageFiles_7t_40[position][1];
}

function image_off_7t_40 (position) {
   var doc = eval("document.image7t_40" + position);
   doc.src = imageFiles_7t_40[position][0];
}