easyui 中设置Layout的一个面板全屏显示

$.extend($.fn.layout.methods, {
    fullScreen: function (jq) {
        return jq.each(function () {
            var layout = $(this);
            var center = layout.layout('panel', 'south');
            center.panel('maximize');
            center.parent().css('z-index', 20);
            $(window).on('resize.full', function () {
                layout.layout('unFullScreen').layout('resize');
            });
        });
    },
    unFullScreen: function (jq) {
        return jq.each(function () {
            var center = $(this).layout('panel', 'south');
            center.parent().css('z-index', 'inherit');
            center.panel('restore');
            $(window).off('resize.full');
        });
    }
});

        <div id="detail"
             style="height:50%"
             data-options="region:'south',
                           title:'明细',
                           collapsed:true,
                           split:true,
                           tools: [{
                                    iconCls:'icon-arrow_out',
                                    handler:fullOrUnfull
                                    }]">
        </div>

// 全屏的时候点击取消执行全屏，取消全屏的时候点击执行全屏
var flag=1
function fullOrUnfull(){
   flag == 1 ? $('#layoutId').layout("fullScreen") : $('#layoutId').layout("unFullScreen");
   flag = flag == 1 ? 0 : 1;
}