<script type="text/javascript" src="http://www.mamicode.com/js/jquery-1.11.0.min.js"></script><script type="text/javascript">    function checkForm(form) {              if ($("#receivemobile").val() == "") {            alert("收货人手机号码不能为空！");            $("#receivemobile").focus();            return false;        }        if ($("#receivemobile").val().length != 11) {            alert("请输入正确的11位收货人手机号码！");            $("#receivemobile").focus();            return false;        }        var patrnmobile = /^1[3|4|5|8][0-9]\d{4,8}$/;        if (!patrnmobile.exec($("#receivemobile").val())) {            alert("请输入正确的收货人手机号码！");            $("#receivemobile").focus();            return false        }        var patrn = /^[0-9]*[1-9][0-9]*$/;        if (!patrn.exec($("#count").val())) {            alert("请输入正整数！");//不包括0            $("#count").val("");//清空值            $("#count").focus();            return false;        }        if ($("#address").val().length < 1 || $("#address").val().length > 20) {            alert("地址长度应在1-20之间！");            $("#address").focus();            return false;        }        if (form.email.value.match(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/)==null) {//可以不是用id取的            alert("请输入正确的邮箱！");            return false;        }          //document.form.submit();//方法提交          //$("#form").submit();//表单提交          //window.location = "xxx.jsp";//跳转          //window.location.reload();//重载 刷新    }   </script><form action="addOrder" method="post" onsubmit="return checkForm(this)" name="form">        receivemobile:<input type="text" name="receivemobile" id="receivemobile"><br>        count:<input type="text" name="count" id="count"><br>        email:<input type="text" name="email"><br>        address:<input type="text" name="address" id="address"><br>        <input type="submit" name="submit"></form>