jQuery+ajax实现⽤户登录验证本⽂实例为⼤家分享了jQuery+ajax实现⽤户登录验证的具体代码，供⼤家参考，具体内容如下<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>登录界⾯</title>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
h3{
display: block;
width: 100%;
height: 50px;
text-align: center;
line-height: 50px;
background-color: cornflowerblue;
cursor: move;
}
#login{
width: 500px;
height: 270px;
margin: 0 auto;
position: absolute;
top: 50%;
left: 50%;
margin-left: -250px;
margin-top: -140px;
border: 1px solid #6495ED;
background-color: #FFFFFF;
display: block;
-moz-user-select: none;
-ms-user-select: none;
-
webkit-user-select: none;
}
table{
margin-top: 50px;
position: absolute;
top: 50px;
left: 0;
width: 100%;
height: 150px;
text-align:center;
}
tr,td{
border: none;
}
tr{
height: 50px;
}
td{
padding: 0 5px 0 5px;
}
#bg{
width: 100%;
height: 100%;
background-color:rgba(0,0,0,0.2);
position: absolute;
top: 0;
left: 0;
}
span{
width: 100px;
height: 16px;
display:block;
margin-bottom: 12px;
}
body{
width: 100%;
height: 100%;
}
.inpt{
width: 300px;
height: 30px;
outline: none;
border: 1px solid darkturquoise;
}
.
red{
color: red;
font-size: 12px;
}
.btn{
outline: none;
width: 60px;
height: 25px;
border: 1px solid #00CED1;
}
</style>
<script src="js/jquery-3.5.1.min.js" type="text/javascript" charset="utf-8"></script> <script type="text/javascript">
$(function () {
// 定义变量
var $mX;
var $mY;
var $move = false; // true是可以移动登录框
// ⿏标按下事件
$("h3").mousedown(function (event) {
$("#login").css("opacity",0.5); // 改变透明度
$move = true;
// 得到⿏标与登录框原点之间的距离
$mX = event.pageX-parseInt($("#login").css("left"));
$mY = event.pageY-parseInt($("#login").css("top"));
})
// ⿏标移动事件
$(document).mousemove(function (event) {
// 得到登录框要移动的量
var x = (event.pageX-$mX);
var y = (event.pageY-$mY);
console.log(x,y)
if($move){
if(x>0&&y>0){
$("#login").css("left",x+"px")
$("#login").css("top",y+"px")
}
}
}).mouseup(function () {
// ⿏标弹起事件
$move = false;
$("#login").css("opacity",1);
})
//  异步请求
$(":submit").click(function () {
$.ajax({
type:"get",
url:"data.php",
data:{"name":$("#user").val(),"password":$("#pwd").val()},
dataType:"json",
success:function (data) {
console.log("成功：",data);
/*if (data.usermsg==1&&data.pwdmsg==1) {
$(location).prop("href","index1.html");
} else{
$("span").text("⽤户名或密码错误").prop("class","red");
}*/
if (data.usermsg==1&&data.pwdmsg==1) {
$(location).prop("href","index1.html");
} else if(data.usermsg==0&&data.pwdmsg==0){
$("span").text("⽤户名或密码错误").prop("class","red");
} else if(data.usermsg==0&&data.pwdmsg==1){
$("span").text("该⽤户不存在").prop("class","red");
} else if(data.usermsg==1&&data.pwdmsg==0){
$("span").text("密码错误").prop("class","red");
}
},
error:function (err) {
console.log("失败",err);
}
})
})
$(":reset").click(function () {
$("span").text("");
})
})
</script>
</head>
<body>
<div id="bg"></div>
<form action="javascript:;" id="login" method="get">
<h3>欢迎登录！</h3>
<table border="0" cellspacing="0" cellpadding="0">
<tr>
<td align="right">⽤户名：</td>
<td align="left"><input type="text" class="inpt" id="user" name="userName"/></td>  </tr>
<tr>
<td align="right">密   码：</td>
<td align="left"><input type="password" class="inpt" id="pwd" name="pwd"/></td>  </tr>
<tr>
jquery ajax例子<td align="center" colspan="2">
<span></span>
<input type="submit" class="btn" value="提交"/>
     
<input type="reset" class="btn" value="重置"/>
</td>
</tr>
</table>
</form>
</body>
</html>
<?php
$user="将军";
$password="1234321";
$username=$_GET["name"];
$pwd=$_GET["password"];
$usermsg=0;
$pwdmsg=0;
if($user==$username){
$usermsg=1;
}
if($password==$pwd){
$pwdmsg=1;
}
echo json_encode(array("usermsg"=>$usermsg,"pwdmsg"=>$pwdmsg));
>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录成功页⾯</title>
</head>
<body>
<span id="" >
登录成功
</span>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录失败页⾯</title>
</head>
<body>
<span id="" >
登录失败
</span>
</body>
</html>
以上就是本⽂的全部内容，希望对⼤家的学习有所帮助，也希望⼤家多多⽀持。

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