Code:
 <html>
  <head>
  <title>Example</title>
 <style type="text/css">
 .leftad{
 position: absolute; left: 0px; top: 0px;
 width: 100px;
 height: 300px;
 }
 .rightad{
 position: absolute; left: 200px; top: 0px;
 width: 100px;
 height: 300px;
 }
 </style>
 </head>
 &lt;body&gt;
 &lt;!--previous code--&gt;
 &lt;!--end previous code--&gt;

 &lt; div class="leftad"&gt;
 &lt;!--whatever you want here--&gt;
 &lt;/div&gt;
 &lt;div class="rightad"&gt;
 &lt;!--whatever you want here--&gt;
 &lt;/div&gt;
 
  &lt;/body&gt;
&lt;/html&gt;
An example of using the division tags.