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Summary of examples of implementing floating advertising code in JavaScript

黄舟Original: 2017-12-04 13:51:548012browse

When we open a web page, we will find that no matter what web page it is, there will be a lot of floating advertisements. Many people will be thinking, how is this effect achieved? Today we will give you a detailed introduction to the summary of JavaScript implementation of floating advertising code!

The first type of floating advertisement does not comply with W3C
The JavaScript floating advertisement code is very good and the code is streamlined, but only one floats at a time, and it can be used after copying. I hope my webmaster friends like it.

 
<html> 
<head> 
<title>漂浮广告</title> 
<body> 
<div id="codefans_net" style="position:absolute"> 
<!--链接地址--><a href="#" target="_blank"> 
<!--图片地址--><img src="/images/logo.gif" border="0"> 
</a> 
</div> 
<script> 
var x = 50,y = 60 
var xin = true, yin = true 
var step = 1 
var delay = 10 
var obj=document.getElementById("codefans_net") 
function float() { 
var L=T=0 
var R= document.body.clientWidth-obj.offsetWidth 
var B = document.body.clientHeight-obj.offsetHeight 
obj.style.left = x + document.body.scrollLeft 
obj.style.top = y + document.body.scrollTop 
x = x + step*(xin?1:-1) 
if (x < L) { xin = true; x = L} 
if (x > R){ xin = false; x = R} 
y = y + step*(yin?1:-1) 
if (y < T) { yin = true; y = T } 
if (y > B) { yin = false; y = B } 
} 
var itl= setInterval("float()", delay) 
obj.onmouseover=function(){clearInterval(itl)} 
obj.onmouseout=function(){itl=setInterval("float()", delay)} 
</script> 
</body> 
</html>

The second type of floating ad does not meet the standards
Js floating ad code, a more classic floating ad, is still very practical. If you are a webmaster, This kind of code is necessary and I hope it will be useful to you.

 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>漂浮广告</title> 
</head> 
<body> 
<DIV id=img1 style="Z-INDEX: 100; LEFT: 2px; WIDTH: 59px; POSITION: absolute; TOP: 43px; HEIGHT: 61px; 
visibility: visible;"><a href="http://sc.jb51.net" target="_blank"><img src="/images/logo.gif" width="80" height="80" border="0"></a></DIV> 
<SCRIPT> 
var xPos = 300; 
var yPos = 200; 
var step = 1; 
var delay = 30; 
var height = 0; 
var Hoffset = 0; 
var Woffset = 0; 
var yon = 0; 
var xon = 0; 
var pause = true; 
var interval; 
img1.style.top = yPos; 
function changePos() 
{ 
width = document.body.clientWidth; 
height = document.body.clientHeight; 
Hoffset = img1.offsetHeight; 
Woffset = img1.offsetWidth; 
img1.style.left = xPos + document.body.scrollLeft; 
img1.style.top = yPos + document.body.scrollTop; 
if (yon) 
{yPos = yPos + step;} 
else 
{yPos = yPos - step;} 
if (yPos < 0) 
{yon = 1;yPos = 0;} 
if (yPos >= (height - Hoffset)) 
{yon = 0;yPos = (height - Hoffset);} 
if (xon) 
{xPos = xPos + step;} 
else 
{xPos = xPos - step;} 
if (xPos < 0) 
{xon = 1;xPos = 0;} 
if (xPos >= (width - Woffset)) 
{xon = 0;xPos = (width - Woffset); } 
} 

function start() 
{ 
img1.visibility = "visible"; 
interval = setInterval(&#39;changePos()&#39;, delay); 
} 
function pause_resume() 
{ 
if(pause) 
{ 
clearInterval(interval); 
pause = false;} 
else 
{ 
interval = setInterval(&#39;changePos()&#39;,delay); 
pause = true; 
} 
} 
start(); 
</SCRIPT> 
</body> 
</html>

Both of the above do not support standard declarations
The third floating ad code that complies with W3C

 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>符合W3C的漂浮广告代码-脚本之家</title> 
</head> 
<body> 
<script> 
document.write ("<DIV id=img1 style=&#39;Z-INDEX: 100; LEFT: 2px; WIDTH: 252px; POSITION: absolute; TOP: 43px; HEIGHT: 172px; ") 
document.write (" visibility: visible;&#39;> ") 
document.write (" <a href=&#39;http://s.jb51.net&#39; target=&#39;_blank&#39;> ") 
document.write (" <img src=&#39;/upload/201204/20120411210123566.gif&#39;style=border:none;/> ") 
document.write (" </a></DIV> ") 
var xPos = 300; 
var yPos = 200; 
var step = 1; 
var delay = 8; 
var height = 0; 
var Hoffset = 0; 
var Woffset = 0; 
var yon = 0; 
var xon = 0; 
var pause = true; 
var interval; 
img1.style.top = yPos; 
function changePos() 
{ 
width = document.documentElement.clientWidth; 
height = document.documentElement.clientHeight; 
Hoffset = img1.offsetHeight; 
Woffset = img1.offsetWidth; 
img1.style.left = xPos + document.documentElement.scrollLeft; 
img1.style.top = yPos + document.documentElement.scrollTop; 
if (yon) 
{yPos = yPos + step;} 
else 
{yPos = yPos - step;} 
if (yPos < 0) 
{yon = 1;yPos = 0;} 
if (yPos >= (height - Hoffset)) 
{yon = 0;yPos = (height - Hoffset);} 
if (xon) 
{xPos = xPos + step;} 
else 
{xPos = xPos - step;} 
if (xPos < 0) 
{xon = 1;xPos = 0;} 
if (xPos >= (width - Woffset)) 
{xon = 0;xPos = (width - Woffset); } 
} 
function start() 
{ 
img1.visibility = "visible"; 
interval = setInterval(&#39;changePos()&#39;, delay); 
} 
function pause_resume() 
{ 
if(pause) 
{ 
clearInterval(interval); 
pause = false;} 
else 
{ 
interval = setInterval(&#39;changePos()&#39;,delay); 
pause = true; 
} 
} 
start(); 
</script> 
</body> 
</html>

Summary:

This article introduces several ways to implement floating ads in JavaScript. Each method is used differently. Friends can choose the one that suits them according to their own needs. I hope it will be useful to you. Work helps!

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