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jquery's code that aligns div horizontally vertically

Source: Internet
Author: User
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Creating a horizontally centered and vertically centered div through CSS is a hassle, and you have to know the size of another div in advance:

The code is as follows Copy Code

. classname{
width:300px;
height:200px;
Position:absolute;
left:50%;
top:50%;
margin:-100px 0 0-150px;
}

Horizontally centered and vertically centered through jquery has been mentioned before, the CSS method only applies to have a fixed size div, so to jquery to play a role

The code is as follows Copy Code

JQuery.fn.center = function () {
This.css ("position", "absolute");
This.css ("Top", ($ (window). Height ()-this.height ())/2+$ (window). scrolltop () + "px");
This.css ("Left", ($ (window). Width ()-this.width ())/2+$ (window). ScrollLeft () + "px");
return this;
}

Use the above function as:
$ (Element). Center ();


There are other ways to implement

The code is as follows Copy Code

<!--HTML-->
<div id= "outer" >
<div id= "Middle" >
<div id= "inner" >
Any text <br>
<b>any Height </b><br>
Any content, for example generated from DB <br>
Everything is vertically centered <br>
</div>
</div>
</div>

<!--CSS-->
html{height:100%;}
body {height:100%;}
#outer {height:600px overflow:visible;width:100%;p osition:relative}/* or without overflow * *
#outer [id] {display:table; position:static;}
#middle {position:absolute; top:50%}/* for explorer only*/
#middle [id] {display:table-cell; vertical-align:middle; width:100%;p osition:static;}
#inner {position:relative top: -50%}/* for Explorer only */
/* Optional: #inner [id] {position:static} */

Examples compatible with Firefox IE6 above Chrome Opera

The code is as follows Copy Code
<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<meta http-equiv= "Content-type" content= "Text/html;charset=utf-8"/>
<title> Absolute Vertical Centered example--http://www.111cn.net/</title>
<script type= "Text/javascript" src= "Http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" ></ Script>
<style type= "Text/css" >
#wrap {height:200px;width:200px;background: #cccccc;p Osition:absolute;}
</style>
<script type= "Text/javascript" >
$ (function () {
function Windowalign () {
var bodyheight = $ (document). Height (),//width of the entire page if this is window Ie6and IE7 gets a negative number
Bodywidth = $ (window). Width (),//height of the entire page if this is document IE7 will not be centered horizontally
Wrapwidth = $ ("#wrap"). Width () (),//////breadth of the content to be centered vertically
Wrapheight = $ ("#wrap"). Height (); The height of the content to be centered vertically
Postop = (bodyheight-wrapheight)/2; Get the top position
Posleft = (bodywidth-wrapwidth)/2; Get the position on the left hand side
$ ("#wrap"). CSS ({"Left":p osleft+ "px", "Top":p ostop+ "px"}); Set position
}
Windowalign ();
$ (window). Resize (function () {//dynamic correction position when adjusting window
Windowalign ();
});
})
</script>
<body>
<div id= "Wrap" ></div>
</body>

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