Adjusts top offset value depending on drupal toolbar status.

drupal_toolbar_offset.js

  // Adjusts top offset depending on additional fixed positioned elements.
  var windowOffsetAdjust = function() {
    if ($window.width() < 1200) {
      if ($body.hasClass('toolbar-vertical')) {
        return 0;
      } else {
        // Adds header height.
        return 60;
      }
    } else {
      if ($body.hasClass('toolbar-horizontal toolbar-tray-open')) {
        // Adds toolbar height.
        return 39;
      } else if($body.hasClass('toolbar-horizontal')) {
        // Adds expanded toolbar height.
        return 79;
      } else {
        return 0;
      }
    }
  };