<form action="updata.php" method="post" id="text_form">

                <div class="yuanGongH ipt">员工号：<input type="text" id="ygh" value="" name="ygh"></div>

                <div class="phone ipt"><i>手机号：<input type="text" value="" name="phone" id="phone"></div>

                <div class="szmm ipt">密码：<input type="text" value="" name="password" id="pass"></div>

                <div class="qrmm ipt">确认密码：</i><input type="text" value="" name="qrpass" id="qrpass"></div>

            </form>

            <div class="btn_zhuce">注册</div>

 $(".btn_zhuce").click(function(){

            var text_form = document.getElementById('text_form');

            var ygh = document.getElementById("ygh").value;

            var phone = document.getElementById("phone").value;

            var pass = document.getElementById("pass").value;

             var qrpass = document.getElementById("qrpass").value;

                    if(ygh == "" ){

                            alert("员工号不能为空");

                            return false;

                            }

                if(phone == "" ){

                            alert("电话不能为空");

                            return false;

                            }

                if(pass == "" ){

                            alert("密码不能为空");

                            return false;

                            }

                if(qrpass !== pass){

                            alert("密码不同");

                            return false;

                            }

                else{

                            text_form.submit();

                            return true;

                            }

        })

<?php 

$ygh=$_POST['ygh'];

$phone=$_POST['phone'];

$pass=$_POST['password'];

$qrpass=$_POST['qrpass'];

$servername = "localhost";

$username = "root";

$password = "123456";

$dbname = "bsbeijing";

// 创建连接   面向过程写法

$conn = mysqli_connect($servername, $username, $password, $dbname);

// Check connection

if (!$conn) {

    die("连接失败: " . mysqli_connect_error());

}

mysqli_query($conn,'set names utf8');//设置字符集

$sql = "INSERT INTO zhuce(`ygh`, `phone`,`password`,`qrpass`)  VALUES ('$ygh', '$phone','$pass','$qrpass')";//查询这个表

//判断是否成功

if (mysqli_query($conn, $sql)) {

    echo "<script>window.location.href='denglu.html';alert('注册成功')</script>";

} else {

    echo "Error: " . $sql . "<br>" . mysqli_error($conn);

}

mysqli_close($conn);

 ?>

<form action="downdata.php" method="post" id="text_form">

                <div class="yuanGongH ipt"><i><img src="data:images/icon1_03.png" alt=""></i><input type="text" value="" id="ygh" name="ygh"></div>

                <div class="miM ipt"><i><img src="data:images/icon2_03.png" alt=""></i><input type="text" name="pass" id="pass" value="" ></div>

</form>

            <div class="zcwj"><span><a href="zhuce.html">注册</a></span></div>

            <div class="btn_denglu">登陆</div>

$(".btn_denglu").click(function(){

            var text_form = document.getElementById('text_form');

            var ygh = document.getElementById("ygh").value;

            var pass = document.getElementById("pass").value;

            text_form.submit();

            return true;

        })

<?php

$ygh=$_POST["ygh"];

$pass=$_POST["pass"];

$servername = "localhost";

$username = "root";

$password = "123456";

$dbname = "bsbeijing";

// 创建连接   面向过程写法

$conn = mysqli_connect($servername, $username, $password, $dbname);

// Check connection

if (!$conn) {

    die("连接失败: " . mysqli_connect_error());

}

mysqli_query($conn,'set names utf8');//设置字符集

$sql = "SELECT ygh, password FROM zhuce WHERE (ygh='$ygh') AND (password='$pass')";//查询这个表特定值

$result = mysqli_query($conn, $sql);//结果

if ($result->num_rows > 0) {

echo "<script>window.location.href='tjdh.html';</script>";

 } else {

  echo "<script>window.location.href='denglu.html';alert('账号密码错误')</script>";

 }

mysqli_close($conn);

?>