jQuery(function($) {
    
    // Anchor
    var eiAnchorLink = '.ei-anchor-link',
        eiAnchorSet = '.ei-anchor-set',
        eiAnchorOrigin = '.ei-anchor-origin',
        eiAnchorContent = '.ei-anchor-post-meta',
        eiAnchorActive = 'ei-active',
        eiAnchorPrefix = 'ei-anchor-active',
        eiAnchorFadeIn = 200,
        eiAnchorFadeOut = 200,
        eiAnchorCurrent = null;

    function eiAnchorReset(id) {
        if (!id) return;
        $('#' + id).fadeOut(eiAnchorFadeOut, function () {
          $(this).appendTo($(eiAnchorOrigin + '[data-id="' + id + '"]')).fadeIn(0);
        });
        $(eiAnchorLink).removeClass(eiAnchorActive);
        $('body').removeClass(eiAnchorPrefix);
    }

    $(eiAnchorLink).click(function(e) {
        e.stopPropagation();
        var id = $(this).data('anchor');
        if (!id || !$('#' + id).length) return;
        var same = eiAnchorCurrent === id;
        if (eiAnchorCurrent) eiAnchorReset(eiAnchorCurrent);
        if (!same) {
          $('#' + id).fadeOut(0).insertAfter(eiAnchorContent).fadeIn(eiAnchorFadeIn);
          $(this).addClass(eiAnchorActive);
          $('body').addClass(eiAnchorPrefix);
          eiAnchorCurrent = id;
        } else {
          eiAnchorCurrent = null;
        }
    });

    $(document).click(function(e) {
        if (eiAnchorCurrent && !$(e.target).closest(eiAnchorSet + ',' + eiAnchorLink).length) {
          eiAnchorReset(eiAnchorCurrent);
          eiAnchorCurrent = null;
        }
    });

});