$(document).ready(function() {

$("nav.top_nav ul li:last").addClass("last-child");

$("ul.cons_products li:nth-child(3n+1)").css("margin-left", "0");
$("ul.cons_products li:nth-child(3)").css("border-right", "none");
$("ul.cons_products li:nth-child(3)").after('<div class="clear"></div>');

});