$(document).ready(function() {
    $('.overlay').click(function() {
        if ($('.dialog').length > 0) {
            $('.dialog').dialog('close');
        }
        var file = '/assets/partials/overlays/'+$(this).attr('rel');
        var $dialog = $('<div class="dialog"></div>')
            .load(file)
            .dialog({
                autoOpen: false,
                resizable: false,
                height: 472,
                zIndex: 40000,
                width: 792,
                title: '',
                close: function() {
                    $('.dialog').remove();
                }
            });
        $dialog.dialog('open');
    });
});