JS在页面根据数量改变总价及按钮进行格式验证

<script type="text/javascript">
    $(document).ready(function () {
        $("#iquantity").bind(‘input propertychange‘, function () {
            var quantity = $("#iquantity").val();
            var price = 49;
            var total = price * quantity;
            $("#atotal").text(total);
            });
        });
</script>

 1 <script type="text/javascript">
 2     $(document).ready(function () {
 3         $("#btSave").click(function () {
 4             if ($("#iquantity").val() == "") {
 5                 alert("请填写购买数量\rPlease fill in the Quantity");
 6                 return false;
 7             }
 8             var zz = /^[1-9]\d*$/;
 9             var qq = $("#iquantity").val();
10             if (!zz.test(qq)) {
11                 alert("请正确填写购买数量,格式为非零的正整数\rPlease fill in the correct format for the Quantity.A positive integer in the form of nonzero.");
12                 return false;
13             }
14             $("#btSave").hide();
15             var words = "请稍后...";
16             $("#F").html(words);//F为一个span标签
17             return true;
18         });
19     });
20 </script>