


This article introduces the design of a simple and interesting login box function containing a Gravatar avatar. The avatar is exported from gravatar.com based on the email ID. This article is a very basic level implementation of CSS and a few lines of Jquery and PHP code. I hope this login box design gives some special flavor to your web project. Please upload your avatar on Gravatar before trying this example.
JavaScript
Contains javascript code. $(".user").keyup(function(){}---user is the name of the input tag. We get the input value through $(this).val(). If the email value passes the regular expression, ajax avatar.php will be requested
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script> <script type="text/javascript" > $(document).ready(function() { $("#username").focus(); $(".user").keyup(function() { var email=$(this).val(); var dataString = 'email='+ email ; var ck_email = /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i; if(ck_email.test(email)) { $.ajax({ type: "POST", url: "avatar.php", data: dataString, cache: false, success: function(html) { $("#img_box").html("<img src="/static/imghwm/default1.png" data-src="http://www.gravatar.com/avatar/?d=mm" class="lazy"+html+"?d=mm' / alt="PHP+jquery+CSS to create avatar login window (imitation QQ login)_php example" >"); } }); } }); }); </script>
HTML code
<div id="login_container"> <div id="login_box"> <div id="img_box"><img src="/static/imghwm/default1.png" data-src="http://www.gravatar.com/avatar/?d=mm" class="lazy" alt="" /></div> <form action="login.php" method="post"><input id="username" class="input user" type="text" /> <input id="password" class="input passcode" type="password" /> <input class="btn" type="submit" value=" Login " /></form></div> </div>
avatar.php
This contains a very simple code: receive the POST email, perform md5 encryption, and return the encrypted data.
<?php if($_POST['email']) { $email=$_POST['email']; $lowercase = strtolower($email); $image = md5($lowercase); echo $image; } ?>
CSS
#login_container { background:url(blue.jpg) #006699; overflow: auto; width: 300px; } #login_box { padding:60px 30px 30px 30px; border:solid 1px #dedede; width:238px; background-color:#fcfcfc; margin-top:70px; } #img_box { background-color: #FFFFFF; border: 1px solid #DEDEDE; margin-left: 77px; margin-top: -108px; position: absolute; width: 86px; height: 86px; }
The rendering is as follows:
The above is the entire content of this article. I hope it will be helpful to everyone’s study. I also hope that everyone will support Script Home.

实现方法:1、用“$("img").delay(毫秒数).fadeOut()”语句,delay()设置延迟秒数;2、用“setTimeout(function(){ $("img").hide(); },毫秒值);”语句,通过定时器来延迟。

修改方法:1、用css()设置新样式,语法“$(元素).css("min-height","新值")”;2、用attr(),通过设置style属性来添加新样式,语法“$(元素).attr("style","min-height:新值")”。

区别:1、axios是一个异步请求框架,用于封装底层的XMLHttpRequest,而jquery是一个JavaScript库,只是顺便封装了dom操作;2、axios是基于承诺对象的,可以用承诺对象中的方法,而jquery不基于承诺对象。

增加元素的方法:1、用append(),语法“$("body").append(新元素)”,可向body内部的末尾处增加元素;2、用prepend(),语法“$("body").prepend(新元素)”,可向body内部的开始处增加元素。

在jquery中,apply()方法用于改变this指向,使用另一个对象替换当前对象,是应用某一对象的一个方法,语法为“apply(thisobj,[argarray])”;参数argarray表示的是以数组的形式进行传递。

删除方法:1、用empty(),语法“$("div").empty();”,可删除所有子节点和内容;2、用children()和remove(),语法“$("div").children().remove();”,只删除子元素,不删除内容。

去掉方法:1、用“$(selector).removeAttr("readonly")”语句删除readonly属性;2、用“$(selector).attr("readonly",false)”将readonly属性的值设置为false。

on()方法有4个参数:1、第一个参数不可省略,规定要从被选元素添加的一个或多个事件或命名空间;2、第二个参数可省略,规定元素的事件处理程序;3、第三个参数可省略,规定传递到函数的额外数据;4、第四个参数可省略,规定当事件发生时运行的函数。


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