Tutorial on how to implement a pop-up login centered interface using css and js

When we log in to a website, a centered window will often pop up. In this article, we will mainly introduce the css and js to implement the pop-up login centered interface. It is very good and has reference value. Friends who need it can refer to it.

What I implemented is similar to the login pop-up windows on many websites. Let’s draw inferences and see the results after I finish writing them.

After clicking to create an album

, the form for creating an album will be displayed in the middle of the screen, and the entire background color will change. Dark, clicking the X in the upper right corner will close the form.

html code

Create button

<li id="create"><a href="#form" rel="external nofollow" ><span>创建相册</span></a></li>

Background p and form p

<p class="background"></p>

<p id="form">
  <p class="fh">
    <h1 id="创建相册">创建相册</h1>
    <a class="close"><img  src="/static/imghwm/default1.png"  data-src="pics/close.png"  class="lazy"   / alt="Tutorial on how to implement a pop-up login centered interface using css and js" ></a>
  </p>
  ...
</p>
css代码
.background {
  display: none;
  position:fixed;
  top:0px;
  left:0px;
  width:100%;
  height:100%;
  background-color:#fff;
  background:-moz-radial-gradient(50% 50%, #fff, #000);/*gradient for firefox*/
  background:-webkit-radial-gradient(50% 50%, #fff, #000);/*new gradient for webkit */
  background:-webkit-gradient(radial, 0 50%, 0 50%, from(#fff), to(#000));/*the old grandient for webkit*/
  opacity:0.5;
  filter:Alpha(opacity=50);
}
#form {
  display: none;
  position:fixed;
  border: 1px solid #ccc;   
  background-color:white;
  top:30%;
  left:30%;
  width: auto;
  border-radius:15px;
  -moz-border-radius:15px;
  box-shadow:0 5px 27px rgba(0,0,0,0.3);
  -webkit-box-shadow:0 5px 27px rgba(0,0,0,0.3);
  -moz-box-shadow:0 5px 27px rgba(0,0,0,0.3);
}

JavaScript code

function showForm() {
  var create = document.getElementById("create");
  var bg = document.getElementsByClassName("background")[0];
  var form = document.getElementById("form");
  var links = document.getElementsByClassName("close");
  for(var i=0;i<links.length;i++) {
    links[i].onclick = function() {
    form.style.display = "none";
    bg.style.display = "none";
    }
  }
  create.onclick = function() {
    form.style.display = "block";
    bg.style.display = "block";
  }

The main principle is to change the display attribute of background p and form p. When the value is block, it is displayed, and when the value is none, the element disappears. And position:fixed; is relative to the current window.

Related recommendations:

Use PHP to implement user login and registration functions

Tutorial on writing a login page using html5 and css3

How to write a login pop-up box using JQuery

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