JavaScript：根据HTML表中的值计算总和

Question

＆＃13;

＆＃13;

<script>
   
    function calculateSum() {
 
        var sum = 0;
        //iterate through each textboxes and add the values
        $(".txt").each(function() {
 
            //add only if the value is number
            if(!isNaN(this.value) && this.value.length!=0) {
                sum += parseFloat(this.value);
            }
 
        });
        //.toFixed() method will roundoff the final sum to 2 decimal places
        $("#sum").html(sum.toFixed(2));
    }
</script>

＆＃13;

<table id="payout12" class="display" style="float:left; width: 100%;border-radius: 5px 5px 5px 5px;
    						box-shadow: 2px 2px 6px #666666;-moz-box-sizing: none;" border=1  data="${payout}" border="1">
								
								<thead>
<h2>Discount</h2>				
								<td class="heading">Charge</td>
								<td class="heading">Cost Before Discount</td>
								<td class="heading">After Plan Discount</td>
								<td class="heading">After Booking Discount</td>
								
					
						 </tr> 
					</thead>
					<tbody>
			<c:forEach items="${payouts}" var="payout" varStatus="row">
							<tr>
							     <td>Base Cost</td> 
							     <td> ${payout.baseCost.costBeforeDiscount}</td>
							     <td>${payout.baseCost.afterPlanDiscount}</td>
							     <td>${payout.baseCost.afterBookingDiscount}</td>
							     
							</tr>
              <c:forEach items="${payouts}" var="payout" >
							<tr>
							     <td>Other Charges</td> 
							     <td>${payout.otherCharges.costBeforeDiscount1}</td>
							     <td>${payout.otherCharges.afterPlanDiscount1}</td>
							     <td>${payout.otherCharges.afterBookingDiscount1}</td>
							     
		</tr>
		</c:forEach>
					

＆＃13;

＆＃13;

＆＃13;

我在网站视图中有一个包含3列和4行的表格。我需要添加列值并在表格底部显示为总计。我使用的是spring mvc3。如何计算JSP中的总和？

但这个代码我上网了。它的输入类型是＆＃34; text＆＃34;。我的要求是将从db检索到的列的值添加到表

表格似乎

＆＃13;

＆＃13;

＆＃13;

<script>
   
    function calculateSum() {
 
        var sum = 0;
        //iterate through each textboxes and add the values
        $(".txt").each(function() {
 
            //add only if the value is number
            if(!isNaN(this.value) && this.value.length!=0) {
                sum += parseFloat(this.value);
            }
 
        });
        //.toFixed() method will roundoff the final sum to 2 decimal places
        $("#sum").html(sum.toFixed(2));
    }
</script>

＆＃13;

＆＃13;

＆＃13;

充电费用除了折扣费用后折扣 基本费用123546 111112 othert收费114523 104523