<form class="form-horizontal" action="javascript:;" enctype="multipart/form-data" method="post">
                                <div class="form-group">
                                    <div class="col-sm-12">
                                        <input type="text" class="form-control" placeholder="请输入您的姓名" name='js_name' id='js_name'>
                                    </div>
                                </div>
                                <div class="form-group">
                                    <div class="col-sm-12">
                                        <input type="text" class="form-control" placeholder="请输入有效的电话号码" name='js_tel' id='js_tel'>
                                    </div>
                                </div>
                                <div class="form-group">
                                    <div class="col-sm-12">
                                        <button class="btn btn-block btn-danger" type="button" onclick="add_jisuan()">立即获取节税方案</button>
                                    </div>
                                </div>
                            </form>

<script type="text/javascript">
        function add_jisuan() {

            var js_name = $("#js_name").val();
            var js_tel = $("#js_tel").val();

            if (js_name == "") {
                alert("姓名不能为空！");
                return false;
            }

            if (js_tel.length != 11) {
                alert("请填写正确手机号码!");
                return false;
            }

            //定义变量接收上面表单每项的值和几个dede隐藏的input的值
            var dataString = 'js_name=' + js_name + '&js_tel=' + js_tel + '&action=post' + '&diyid=4&do=2&dede_fields=js_name,text;js_tel,text&dede_fieldshash=e57ddd848853213eafabbda69e8775da';

            $.ajax({

                type: "POST",

                url: "/plus/diy.php", //提交到后台文件

                data: dataString, //传值

                success: function(data) {

                    alert('提交成功'); //成功打印PHP返回的值

                }

            });

            return false;

        }
    </script>