var J = jQuery.noConflict();
J(document).ready(function() {
   J("#blk_lt img").after('<img src="fileadmin/images/001.png" width="176" height="126" class="mask" />');
   J("#blk_cn img").after('<img src="fileadmin/images/002.png" width="176" height="126" class="mask" />');
   J("#blk_rt img").after('<img src="fileadmin/images/003.png" width="176" height="126" class="mask" />');
});