$(function() {

  $links = $(".primary-links");
  width  = $links.width();
  $links = $links.children();

  $links.each(function() {

    $link = $(this);
    width -= $link.width();

  });

  space = Math.floor(width / ($links.length - 1));
  $links = $links.not(".first");
  $links.css("padding-left", space + "px");

});