jquery 无刷新添加/删除 input行实时计算购物车价格

jquery 未来事件插件jq_Live_Extension.js
<script>  
    $(document).ready(function(){  
       //<tr/>居中  
        $("#tab tr").attr("align","center");  
         
        //增加<tr/>  
       $("#but").click(function(){  
            var _len = $("#tab tr").length;          
            $("#tab").append("<tr id="+_len+" align=\'center\'>"  
                               +"<td>"+_len+"</td>"  
                               +"<td align=\'left\'><input type=\'\' name=\'product_id[]\' value=\"\" onFocus=\"this.value=\'\'\"/ class=\"order_form_product_description\" id=\'product_id"+_len+"\'></td>"  
                               +"<td><input type=\'text\' name=\'quantity[]\' id=\'quantity"+_len+"\' class=\'num-pallets-input\' ></td>"  
                               +"<td><input type=\'text\' name=\'price[]\' id=\'price"+_len+"\' class=\'price-per-pallet\'/></td>"  
                               +"<td class=\'row-total\'><span id=\'thistotal"+_len+"\' class=\'row-total-input\'></span></td>"  
                               +"<td><a href=\'javascript:void(0)\' onclick=\\'deltr("+_len+")\\'><img src=\'form_del_icon.gif\'></a></td>"  
                           +"</tr>");              
        })      
   })  
      
    //删除<tr/>  
    var deltr =function(index)  
    {  
       var _len = $("#tab tr").length;  
        $("tr[id=\'"+index+"\']").remove();//删除当前行  
          
       for(var i=index+1,j=_len;i<j;i++)  
       {  
            var nextTxtVal = $("#quantity"+i).val();  
            var nextPriceVal= $("#price"+i).val();  
            var nextproduct_idVal= $("#product_id"+i).val();  
            var nextthistotalVal= $("#thistotal"+i).text();  
            //alert (nextthistotalVal);  
          $("tr[id=\\'"+i+"\\']")  
                .replaceWith("<tr id="+(i-1)+" align=\'center\'>"  
                               +"<td>"+(i-1)+"</td>"  
                               +"<td align=\'left\'><input type=\'text\' name=\'product_id[]\' value=\'"+nextproduct_idVal+"\' class=\"order_form_product_description\" id=\'product_id"+(i-1)+"\'></td>"  
                                +"<td><input type=\'text\' name=\'quantity[]\' value=\'"+nextTxtVal+"\' id=\'quantity"+(i-1)+"\' class=\'num-pallets-input\'/></td>"  
                                +"<td><input type=\'text\' name=\'price[]\' class=\'price-per-pallet\' name=\'price"+(i-1)+"\' value=\'"+nextPriceVal+"\' /></td>"  
                                +"<td class=\'row-total\'><span class=\'row-total-input\'>"+nextthistotalVal+"</span></td>"  
                               +"<td><a href=\'javascript:void(0)\' onclick=\\'deltr("+(i-1)+")\\'><img src=\'form_del_icon.gif\'></a></td>"  
                           +"</tr>");  
         }    
  
         calcProdSubTotal();  
      
  
             
 }  
</script>  
<body>  
   <table id="tab" border="0" width="500" align="center" style="margin-top:20px">  
        <tr>  
            <td></td>  
            <td align="left"><span class="red">*</span>Product Description</td>  
            <td><span class="red">*</span>Quantity</td>  
            <td><span class="red">*</span>Unit Price (USD)</td>  
            <td>Amount(USD)</td>  
            <td></td>  
     </tr>  
     <tr>  
     <td>1</td>  
     <td align="left"><input type="" name="product_id[]" value="" onFocus="this.value=\'\'" class="order_form_product_description" /></td>  
     <td><input type="text" class="num-pallets-input" name="quantity[]" onKeyPress="if ((event.keyCode<48 || event.keyCode>57)) event.returnValue=false"/></td>  
     <td><input type="" class="price-per-pallet" name="price[]" onKeyPress="if (event.keyCode!=46 && (event.keyCode<48 || event.keyCode>57)) event.returnValue=false"></td>  
     <td class="row-total"><span class="row-total-input"></span></td>   
     <td></td>  
     </tr>  
       
   </table>  
     
    <div style="margin-left:205px;margin-top:20px">  
       <img src="add_more_products.gif" id="but" style="cursor:pointer"/>  
    </div>  
    <div style=" float:right; padding-right:50px; font-weight:bold">Total:<span class="red">US$<span id="product-subtotal">0</span></span><input type="hidden" name="product-subtotal" /></div>  
</div>
jquery 无刷新添加/删除 input行 实时计算购物车价格

jquery 无刷新添加/删除 input行实时计算购物车价格
