var imageFiles_7t_31 = new Array();
imageFiles_7t_31['0'] = new Array ('_images/7t_What_is_Leather.gif', '_images/7t_What_is_LeatherMouseover.gif');

function image_on_7t_31 (position) {
   var doc = eval("document.image7t_31" + position);
   doc.src = imageFiles_7t_31[position][1];
}

function image_off_7t_31 (position) {
   var doc = eval("document.image7t_31" + position);
   doc.src = imageFiles_7t_31[position][0];
}