Enterable drop-down box, jquery.editable-select

//须引入jquery和以下
        <link rel="stylesheet" type="text/css" href="jquery.editable-select.min.css"/>
        <script type="text/javascript" src="jquery.editable-select.min.js"></script>
                                                <div class="form-group">
                                                    <label class="col-sm-4 control-label">合同编号： </label>
                                                    <div class="col-sm-8">
                                                        <select class="form-control" name="entity.contractCode" id="contractCode" value="${entity.contractCode}">
                                                                 <s:iterator value="contractCodeList">
                                                                    <s:if test="not empty entity.contractCode">
                                                                        <option value="${entity.contractCode}" selected>${entity.contractCode}</option>
                                                                    </s:if>
                                                                    <s:else>
                                                                        <option value="${value}">${value}</option>
                                                                    </s:else>
                                                                </s:iterator>
                                                        </select>
                                                    </div>
                                                </div>

   setSelectedOption("#contractCode",contractCode);
    $('#contractCode').editableSelect({
        effects: 'slide',
        //可选参数default、fade
        filter: false,// 不过滤，否则选中后其它选项消失
    });


function setSelectedOption(selector, value){
    if (value.length !=0) {
        $(selector +" > option[value='"+value+"']").attr("selected",true);
    }
}