gistfile1.js

Drupal.behaviors.hvNinesixty = {
  attach: function (context) {

    $(document)
      .bind('drupalOverlayOpen', function() {
        $('iframe:not(iframe.overlay-element)').hide();
      })
      .bind('drupalOverlayClose', function() {
        $('iframe:not(iframe.overlay-element)').show();
      })

    if (Drupal.behaviors.overlayParent == undefined) {
      return;
    }
    if (Drupal.behaviors.overlayParent.processed == true) {
      $('html').addClass('overlay-ready');
    };
  }
}