function checkClaimVoucher(checkResult){
if(!confirm('确定'+checkResult+'报单吗')) return;
document.getElementById("result").value = checkResult;
document.checkResultForm.submit();
}
<s:form action="checkResult_checkClaimVoucher" name="checkResultForm" method="POST">
<table width="90%" border="0" cellspacing="0" cellpadding="0" class="addform-base">
<tr>
<td>
审批意见:
</td>
</tr>
<tr>
<td>
<textarea name="" id="textarea" cols="45"
rows="5"></textarea>
</td>
</tr>
<!--表单提交行-->
<tr>
<td colspan="3" class="youbing">
<s:hidden name="claimVoucher.id" value="<s:property value='claimVoucher.id'/>"/>
<s:hidden id="result" name="claimVoucher.status" value=""/>
<input type="button" name="claimVoucher.status" id="button" value="审批通过"
class="submit_01" onclick="checkClaimVoucher('通过')" />
<%-- <s:hidden id="claimId" name="checkResult.claimId" value="%{claimVoucher.id}"/> --%>
<s:if test='#session.employee.positionId != 4'>
<input type="button" name="claimVoucher.status" id="button" value="审批拒绝"
class="submit_01" onclick="checkClaimVoucher('拒绝')" />
<input type="button" name="claimVoucher.status" id="button" value="打回"
class="submit_01" onclick="checkClaimVoucher('打回')" />
</s:if>
</td>
</tr>
</table>
</s:form>