Home > Developer > JavaScript

Keep the footer at the bottom of the page-Javascript + Css implementation

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

Function: whether the browser is dragged up or down, the footer DIV block is kept at the bottom of the page.
1. Write Javascript code and DIV/CSS code in the same file:
<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
<Title> keep the footer at the bottom of the page below the screen </title>
<! -- DIV block CSS -->
<Style type = "text/css">
* {Margin: 0; padding: 0 ;}
# Top {background: #33 CCFF; text-align: center ;}
# Bottom {background: # FFCC00; text-align: center; width: 100% ;}
</Style>

</Head>

<Body>
<Div id = "top"> top </div>
<Div id = "bottom"> bottom </div>
<! -- Javascript code is written at the end to facilitate the code to read relevant information after the top and bottom DIV blocks are fully loaded. -->
<Script language = "javascript" type = "text/javascript">
Function calcDistance (){
Var topHeight = document. getElementById ("top"). scrollHeight;
Var bottomHeight = document. getElementById ("bottom"). scrollHeight;
Var allHeight = document.doc umentElement. clientHeight;
Var bottom = document. getElementById ("bottom ");
If (topHeight + bottomHeight) <allHeight ){
Bottom. style. position = "absolute ";
Bottom. style. bottom = "0 ";
} Else {
Bottom. style. position = "";
Bottom. style. bottom = "";
}
SetTimeout (function () {calcDistance () ;}, 10 );
}
CalcDistance ();
</Script>

</Body>
</Html>

Effect: When two DIV blocks are not intersection:



 

When the two DIV blocks overlap, there is no coverage (often when the second bottom is set to 0 ):



 

2. write Html, DIV/CSS, and Javascript in different files:
Htmlfile index.html (index.js and index.css are used in the Link ):
<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN"

Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>
<Html xmlns = "http://www.w3.org/1999/xhtml">

<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
<Title> keep the footer at the bottom of the page below the screen </title>
<Link href = "index.css" rel = "stylesheet" type = "text/css"/>
<Script type = "text/javascript" language = "javascript" src = "index. js"> </script>
</Head>

<Body>
<Div id = "top"> top </div>
<Div id = "bottom"> bottom </div>
<Script language = "javascript" type = "text/javascript">
CalcDistance ();
</Script>
</Body>
</Html>

Index.css file:
@ Charset "UTF-8 ";
/* CSS Document */
*{
Margin: 0;
Padding: 0;
}
# Top {
Background: #33 CCFF;
Text-align: center;
}
# Bottom {
Background: # FFCC00;
Text-align: center;
Width: 100%;
}

Note: It is best to give the height of the top and bottom DIV blocks to facilitate javascript code calculation. In some cases (for example, when the top block contains other DIV blocks, may cause inaccurate computation in Some browsers)
Index. js file:
// JavaScript Document
Function calcDistance (){
Var topHeight = document. getElementById ("top"). scrollHeight;
Var bottomHeight = document. getElementById ("bottom"). scrollHeight;
Var allHeight = document.doc umentElement. clientHeight;
Var bottom = document. getElementById ("bottom ");
If (topHeight + bottomHeight) <allHeight ){
Bottom. style. position = "absolute ";
Bottom. style. bottom = "0"; // if an error occurs when you set a distance from the bottom of the image, try
} Else {
Bottom. style. position = "";
Bottom. style. bottom = "";
}
SetTimeout (function () {calcDistance () ;}, 10 );
}

3. If you want the minimum distance between the DIV block on the bottom bar and the last DIV block on it to A (assuming 150px), modify the index. js file as follows:
// JavaScript Document
Function calcDistance (){
Var topHeight = document. getElementById ("top"). scrollHeight;
Var bottomHeight = document. getElementById ("bottom"). scrollHeight;
Var allHeight = document.doc umentElement. clientHeight;
Var bottom = document. getElementById ("bottom ");
If (topHeight + bottomHeight + 150) <allHeight ){
Bottom. style. position = "absolute ";
Bottom. style. bottom = "0 ";
Bottom. style. top = "";
} Else {
Bottom. style. position = "relative ";
Bottom. style. bottom = "";
Bottom. style. top = "150px"; // It is 150 pixels away from the previous DIV block. If 150px cannot reach the expected result, try 150 (remove px)
}
SetTimeout (function () {calcDistance () ;}, 10 );
}

(When the distance between two DIV blocks is less than 150 pixels, the vertical scroll bar appears ):




From film cloud drifting
 

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
wordpress the field excel page footer keep alive web page implementation of data structures entire bottom row of numbers on check what bottom row of numbers on checks implementation of ajax in php

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More