체크박스 관련 질문입니다. 채택완료

</strong></p><p><strong></strong>function checkTotal()
{
    var total = 0;
    var result = 0;
    var form = document.getElementById("forderform");
    var max = form.length;
    for(var i = 0; i < max; i++)
    {
        if(form.elements[i].name == "room[]" && form.elements[i].checked == true)
        {
            var wr_id = form.elements[i].value;
            var price = document.getElementById("price_" + wr_id).innerHTML.replace(/,/g, "");
            total += parseInt(price);
            result++;
        }
    }
    document.getElementById("total").innerHTML = getComma(total);</p><p>if (document.getElementById("discount").checked)
    document.getElementById("good_mny").value = total -parseInt(document.getElementById("discount").value);</p><p>else</p><p>  document.getElementById("good_mny").value = total ;
    return result;
}

필드부분입니다.
<input type="checkbox" name="room[]" value="<?php echo $ROOM[$i]['wr_id']; ?>" onclick="checkTotal();" <?php echo $ROOM[$i]['disabled']; ?>></p><p>학생할인<input type="checkbox" value="2000" id="discount">
그리고 토탈
 <td class="red" colspan="2"><span id="total">0</span>원</td>	<strong></strong></p><p><strong>
</strong></p><p><strong>
</strong></p><p><strong>