var imageFiles_7t_4 = new Array();
imageFiles_7t_4['0'] = new Array ('_images/7t_What_is_Leather.gif', '_images/7t_What_is_LeatherMouseover.gif');

function image_on_7t_4 (position) {
   var doc = eval("document.image7t_4" + position);
   doc.src = imageFiles_7t_4[position][1];
}

function image_off_7t_4 (position) {
   var doc = eval("document.image7t_4" + position);
   doc.src = imageFiles_7t_4[position][0];
}