easyui layout 折叠后显示标题

( function ($){
   var buttonDir = {north: 'down' ,south: 'up' ,east: 'left' ,west: 'right' };
    $.extend($.fn.layout.paneldefaults,{
        onBeforeCollapse: function (){
            /**/
            var popts = $( this ).panel( 'options' );
            var dir = popts.region;
            var btnDir = buttonDir[dir];
            if (!btnDir) return false ;
            setTimeout( function (){
                var pDiv = $( '.layout-button-' +btnDir).closest( '.layout-expand' ).css({
                    textAlign: 'center' ,lineHeight: '18px' ,fontWeight: 'bold'
                });
               if (popts.title){
                    var vTitle = popts.title;
                    if (dir == "east" || dir == "west" ){
                        var vTitle = popts.title.split( '' ).join( '<br/>' );
                        pDiv.find( '.panel-body' ).html(vTitle);
                    } else {
                        $( '.layout-button-' +btnDir).closest( '.layout-expand' ).find( '.panel-title' )
                        .css({textAlign: 'left' })
                        .html(vTitle)
                    }
                   }
            },100);
        }
    });
})(jQuery);