How to center the content of a web page

This question gets asked very often in the forums and newsgroups, and is very easy once you know how.

Create a "wrapper" div to hold all your content and apply its width property through CSS, then give it a margin:auto attribute

<style type="text/css">
  #wrapper {width: 760px;margin:auto}
  <form id="form1" runat="server">
    <div id="wrapper">
      <div id="content">