select空间提交form表单传递参数

如下， 到了

<form name="modelForm" action="/portal/defectinfo/toDefectPage?projectname=<%=request.getAttribute("projectname")%>"  method="post"  theme="simple">

<select id="codeid" name="codeid" headerKey="0" onChange="modelForm.submit()" style="padding-left:5px; vertical-align:middle; font-size:14px;border-radius:5px; 160px;height:33px">
<c:forEach items= "${mapcode}" var="c">
<option value="${c.key}">${c.value}</option>
</c:forEach>
</select>

</form>