表单为：
<form name="costomForm" method="post">
    <ec:table action="paymentInput.do?action=getCostomFee" items="costomFeeList" imagePath="images/table/compact/*.gif"
    retrieveRowsCallback="limit"
    title="" width="100%" rowsDisplayed="10" sortable="true" var="list" filterable="false" cellspacing="1" >
<ec:row>
<ec:column title="物业公司" property="companyName" filterable="false" style="width: 10%;text-align:left;">
${list.companyName }
</ec:column>
<ec:column title="管理处" property="officeName" filterable="false" style="width: 10%;text-align:left;">
${list.officeName }
</ec:column>

<ec:column title="小区" property="zoneName"  filterable="false" style="width: 10%;">
${list.zoneName }
</ec:column>

<ec:column title="楼宇" property="floorName" format="yyyy-MM-dd" cell="date"  filterable="false"  style="width: 10%;">
${list.floorName }
</ec:column>

<ec:column title="房间" property="roomName" filterable="false" style="width: 10%;">
${list.roomName }
</ec:column>

<ec:column title="费用类型" property="feeTypeName" filterable="false" style="width: 10%;" >
${list.feeTypeName }
</ec:column>

<ec:column title="起始月份" property="startTime" filterable="false" style="width: 10%;" >
${list.startTime }
</ec:column>
<ec:column title="结束月份" property="endTime" filterable="false" style="width: 10%;">
${list.endTime }
</ec:column>
<ec:column title="应付款" property="currentFeeNum" filterable="false" style="width: 6%;">
${list.currentFeeNum }
</ec:column>

<ec:column title="实付金额" property="payingFeeNum" filterable="false" style="width: 6%;">
${list.payingFeeNum }
</ec:column>
<ec:column title="操作员" property="userName" filterable="false" style="width: 8%;">
${list.userName}
</ec:column>
</ec:row>
</ec:table>
<input type="button" value="提交" onclick="inputCostomFee()">
    </form>


js文件为：
function inputCostomFee(){

document.costomForm.action="paymentInput.do?action=inputCostomFee";
document.costomForm.submit();


可是 提示 对象不支持此属性或方法，
document.costomForm.action 这块有问题，可我不知道什么原因