체크박스를 체크하면

 

wr_10 에 체크 된 값의 포인트 합계를 나오게 하고 싶습니다.

 

체크박스를 체크해도 계속 포인트 합계가 0으로 나오는 이유를 모르겠습니다..

 

감사합니다.

 

<form name="fwrite" method="post" action="javascript:fwrite_check(document.fwrite);" enctype="multipart/form-data" autocomplete="off">
<table width="360">
<tr>        
    <input type=hidden name=wr_1     value="<?=$write[wr_1]?>">
    <input type=hidden name=wr_2     value="<?=$write[wr_2]?>">
    <input type=hidden name=wr_3     value="<?=$write[wr_3]?>">
    <input type=hidden name=wr_10    value="<?=$write[wr_10]?>">
    <input type=hidden name=hiddenwr_10 value="0">
                              <td width="168"><b>포인트옵션</b></td>
                              <td width="182"><b>서비스 내용</b></td>
                            </tr>
                            <tr bgcolor="ffffff">
                              <td bgcolor="#E6F7FF" width="168"><input type="checkbox" name="wr_1" value="20000" onClick="this.form.wr_10.value=checkChoice(this);" >
    <? if ($write[wr_1] == 20000) echo "checked";?>     스페셜 </td>                            
                              <td width="182">20,000 p/30일</td>
                            </tr>
                            <tr bgcolor="ffffff">
                              <td bgcolor="#E6F7FF" width="168"><input type="checkbox" name="wr_2" value="16000" onClick="this.form.wr_10.value=checkChoice(this);" ><? if ($write[wr_2] == 16000) echo "checked";?>
      박스광스</td>
                              <td width="182"> 6,000 p/30일
                <p>1</td>
                            </tr>
                          </table>                                            <tr>
                        <td><table width="361" cellpadding="5" cellspacing="1" bgcolor="cccccc" >
                          <tr>
                            <td width="80" align="center" bgcolor="#FFECEE" class="red"><b>포인트합계</b></td>
                            <td bgcolor="ffffff" width="258"><input type="text" name="wr_10" value="0"  size="10" >
       </td>
                          </tr>
                        </table>          
</form>

   
<script language='javascript'>
 
function checkChoice(whichbox) {
with (whichbox.form) {
if (whichbox.checked == false) {
hiddenwr_10.value = eval(hiddenwr_10.value) - eval(whichbox.value);
} else {
hiddenwr_10.value = eval(hiddenwr_10.value) + eval(whichbox.value);
}
return(formatCurrency(hiddenwr_10.value));
}
}

function formatCurrency(num) {
num = num.toString().replace(/$|,/g,'');

if(isNaN(num)) { num = "0"; }
cents = Math.floor((num*100+0.5)%100);
num = Math.floor((num*100+0.5)/100).toString();
if(cents < 10) {
cents = "0" + cents;
}

return (num);
}

</script>