<select id="aucBrandNo" class="easyui-combobox"  name="aucBrandNo" style="width: 160px;"

     data-options="required:true,onHidePanel:function(){validateComboboxInputValue(this)}">

   </select>

//combobx数据的加载
function auctionSelect(aucBrandNos,aucBrandNo) {

    var aucBrandNoStr = '';

    $.each(aucBrandNos, function(index, temp) {

            aucBrandNoStr += '<option value=' + temp.key + '>' + temp.name.substring(1,4) + temp.name.substring(0,1)

                    + '</option>';

    });

    $('#aucBrandNo').html(aucBrandNoStr);

    $('#aucBrandNo').combobox({});

    $('#aucBrandNo').combobox('setValue', aucBrandNo);

    keyDownEventFun();//回车事件公共方法

};

function keyDownEventFun(){

    $('#aucBrandNo').textbox('textbox').keydown(function (event) {

        if (event.keyCode == 13) {

            //TODO

        }

    });

}