Tip & Tricks

<!DOCTYPE html>
<html>
<head>
<script class="jsbin" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
  <script class="jsbin" src="http://ajax.aspnetcdn.com/ajax/jquery.templates/beta1/jquery.tmpl.min.js"></script>
<meta charset=utf-8 />
<title>JS Bin</title>
<!--[if IE]>
  <script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<style>
  article, aside, figure, footer, header, hgroup,
  menu, nav, section { display: block; }
  #modal {
    width: 600px;
    border: 1px solid #CCC;
    box-shadow: 0 1px 5px #CCC;
    border-radius: 5px;
    font-family: verdana;
    margin: 25px auto;
    overflow: hidden;
  }
  #modal header {
    background: #f1f1f1;
    background-image: -webkit-linear-gradient( top, #f1f1f1, #CCC );
    background-image: -ms-linear-gradient( top, #f1f1f1, #CCC );
    background-image: -moz-linear-gradient( top, #f1f1f1, #CCC );
    background-image: -o-linear-gradient( top, #f1f1f1, #CCC );
    box-shadow: 0 1px 2px #888;
    padding: 10px;
  }
  #modal h1 {
    padding: 0;
    margin: 0;
    font-size: 16px;
    font-weight: normal;
    text-shadow: 0 1px 2px white;
    color: #888;
    text-align: center;
  }
  #modal section {
    padding: 10px 30px;
    font-size: 12px;
    line-height: 175%;
    color: #333;
  }
</style>
</head>
<body>
 
  <div id="modal">
    <header><h1>Something Here</h1></header>
    <section>
      <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend leo.</p>
      <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend leo.</p>
      <p>Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Vestibulum tortor quam, feugiat vitae, ultricies eget, tempor sit amet, ante. Donec eu libero sit amet quam egestas semper. Aenean ultricies mi vitae est. Mauris placerat eleifend leo.</p>
    </section>
  </div>
 
</body>
</html>

Demo:
http://jsbin.com/ogesuf/5/edit

For Firefox
<style type="text/css">
@-moz-document url-prefix() {
  .example {
   
    width: 960px;
}
}
.ie .main_navi ul {
   width: 965px;
}
</style>

For ie
<!--[if IE]>
<style type="text/css">
.example {
   
    width: 965px;
}
</style>
<![endif]-->