To can center a fixed or absolute positioned element (Div or other block element), set the right and left CSS properties to 0, and then margin-left and margin-right to auto, as if you were centering a static positioned element.
- Example, centering a fixed Div:
<style type="text/css">
#divid {
  position: fixed;
  /* center the element */
  right: 0;
  left: 0;
  margin-right: auto;
  margin-left: auto;
  /* give it dimensions */
  min-height: 8em;
  width: 90%;
  background: #dafeda;
}
</style>

<div id="divid">http://CoursesWeb.net/</div>
- Example, centering an absolute positioned Div (the parent element must have: position: relative):
<style type="text/css">
#parent{
 position:relative;
 height:8.5em;
}
#divid {
  position: absolute;
  /* center the element */
  right: 0;
  left: 0;
  margin-right: auto;
  margin-left: auto;
  /* give it dimensions */
  min-height: 8em;
  width: 90%;
  background: #dafeda;
}
</style>

<div id="parent">
  <div id="divid">http://marplo.net/jocuri</div>
</div>
Demo:
http://CoursesWeb.net/

Daily Test with Code Example

HTML
CSS
JavaScript
PHP-MySQL
Which tag is used to add definition lists into a <dl> element?
<dt> <dd> <li>
<dl>
 <dt>HTML</dt>
  <dd> - Hyper Text Markup Language</dd>
  <dd> - Language for web pages</dd>
</dl>
Which CSS property can hide an element on page, letting an empty space in its place?
display position visibility
#id {
  visibility: hidden;
}
Click on the event which is triggered when the mouse clicks on an object.
onclick onmouseover onfocus
document.getElementById("id").onclick = function(){
  alert("http://CoursesWeb.net/");
}
Indicate the PHP variable that contains the contents of both $_GET, $_POST, and $_COOKIE arrays.
$_SESSION $_GET $_REQUEST
if(isset($_REQUEST["id"])) {
  echo $_REQUEST["id"];
}
Center Fixed and Absolute element

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