var orgCount = 0;
//城市
$(‘#cityName‘).combobox({
    method: ajaxConfig.reqMtd,
    url: pageConfig.json.city,
    width: 130,
    height: 32,
    //下拉框面板固定高度
    //panelHeight: 130,
    editable: false,
    //加载成功后给变量赋值，记录数据数目
    onl oadSuccess: function(data){  
        orgCount = data.length; 
    },
    //面板展开时触发
    onShowPanel: function () {
        // 动态调整高度  
        if (orgCount < 10) {  
            $(this).combobox(‘panel‘).height("auto");  
        }else{
            $(this).combobox(‘panel‘).height(200); 
        }
    }
});