ssh中我在jsp页面上写了一个checkbox，可以在js中取到，但是在action中怎么获取呢？？？。

<form action="meet_addMeet.action" method="post">
    <ul class="forminfo">
    <li><input name="meet.meetid" type="hidden" value="${meet.meetid}" /></li>
    <li><label>会议名称</label><input name="meet.meetname" type="text" class="dfinput" id="meetname" value="${meet.meetname}" /></li>
    <li><label>开始时间</label><input name="meet.starttime" type="text" class="dfinput" id="datetimepicker"  value="${meet.starttime}" /></li>
    <li><label>结束时间</label><input name="meet.endtime" type="text" class="dfinput"  id="datetimepicker1"  value="${meet.endtime}" /></li>
    <li><input name="meet.user.oid" type="hidden"  class="dfinput"  value="${session.userid}" /></li>
    <li><label>会议室</label>
        <cite>
        <s:action name="room_findkxBoardroom"></s:action>

        <select name="meet.room.boardroomid" class="dfinput" id="boardroomid">
            <s:iterator var="rl" value="#attr.roomkx">
                <option value="<s:property value="#rl.boardroomid"/>">
                    <s:property value="#rl.boardroomtype"/>
                </option>
            </s:iterator>
        </select>
        </cite>
    </li>

    <li>
    <label>参与人员</label>
    <s:if test="#attr.groupList==null">
        <s:action name="group_findListGroup"></s:action>
    </s:if> 

    <table class="tablelist" border="0" width="60%">
    <s:if test="#attr.userList==null">
        <s:action name="user_findAllUser"></s:action>
    </s:if> 
    <s:iterator value="#attr.groupList" var="gl">
        <tr>
            <th><input type="checkbox" name="checkGroup" value="${gl.groupid}" />${gl.groupname}</th>

            <s:iterator value="#attr.userList" var="ul">
                <s:if test="#ul.group.groupid == #gl.groupid"> 
                    <tr><td><input type="checkbox" name="checkUserList" value="${ul.oid}" />${ul.username}</td></tr>
                </s:if>
            </s:iterator>
        </tr>
    </s:iterator>
    </table>
    </li>

    <li><label>&nbsp;</label><input name="" type="submit" class="btn" value="确认保存" onclick="javascript:return enterUser();" />
        <label>&nbsp;</label><input name="" type="reset" class="btn" value="重置" />
    </li>
    </ul>
    </form>

    这是js中取取值

obj = document.getElementsByName("checkUserList");
    check_val = [];
    for(k in obj){
        if(obj[k].checked)
                check_val.push(obj[k].value);
        }
    alert(check_val);

使用sessionmap和request都无法取到，求帮助

不是有form吗，他会一起提交的吧