jquery 表单点击提交及验证常用写法 jquery获取元素

获取元素属性
<p><a href="//www.runoob.com" id="runoob">菜鸟教程</a></p>

$("#runoob").attr("id")
值为runoob

点击关闭按钮页面重新加载

$(".close").on("click", function() {
        window.location.reload();
    })

 $("#submit").unbind("click").on("click", function() {
        $("#submit").attr("disabled", "disabled");
        var area = $("#area").val();
        if (area == '') {
            alert("请选择222");
            return;
        }
        var schoolname = $("#schoolname").val();
        if (schoolname == '') {
            alert("请填写11");
            return;
        }
        var credit_code = $("#credit_code").val();
        if (credit_code == '') {
            alert("请填写222");
            return;
        }
        var goods_amount = parseFloat($("#goods_amount").val());
        if (isNaN(goods_amount) || goods_amount <= 0) {
            alert("111误,请重新填写");
            return;
        }

 if (confirm("是否确定提交")) {
            var data = {
                "act": "gwksubmit",
                "area": area,
                "schoolname": schoolname,
                "credit_code": credit_code,
                "goods_amount": goods_amount,
                "user_id": user_id,
                "remark": remark
            };
            $.post("xxx.php", data, function(d) {
                //$(".popBox").css('display':'block');   // display: flex;
                $(".popBox").css('display', 'block');
            })
        }