So, the issue is that you want side-by side divs with scrollable content on each side. Don't use iFrames. Why? Because it breaks most validation: HTML 4.1, Strict DTD, and XHTML 1.0 Strict DTD. Instead, if you are pulling all your content from your own site, use includes or code everything on the same page and use divs.

Left div content goes here.

You can fill content as much as you want, and your right div won't move.

Now you can play with and set the margins & padding to taste, add borders, and make everything look cool.

Here's some random lorem ipsum stuff:

"Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?"

Right div content goes here. I'm choosing to scroll this side by using the CSS overflow property. Here's a nice image:

Schneck TCS Logo

And if I keep filling up this side with more lorem ipsum stuff, I get a scroll box on this side:

"Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

2nd right div content goes here. I'm choosing to scroll this side by using the CSS overflow property. Here's a nice image:

Schneck TCS Logo

And if I keep filling up this side with more lorem ipsum stuff, I get a scroll box on this side:

"Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

The Code:


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Side-By-Side DIVs Example 1</title>
<style type="text/css">
body {
   margin: 0;
   padding: 0;
}
#container {
   margin: 1%;
   padding: 0;
   width: 97%;
   background-color: #FFFFCC;
}
#left, #right1, #right2 {
   float: left;
   width: 46.5%;
   margin: 1% 0 1% 1%;
   padding: 1%;
   background-color: #00CCFF;
   color: #000;
}
#left {
	height: 400px;
	overflow: auto;
}
#right1 {
   float: right;
   margin: 1% 1% 1% 0;
   overflow: auto;
   height: 175px;
}
#right2 {
   float: right;
   margin: 1% 1% 1% 0;
   overflow: auto;
   height: 175px;
}
.clear {
   height: 0;
   font-size: 1px;
   margin: 0;
   padding: 0;
   line-height: 0;
   clear: both;
}
</style>
</head>

<body>
 <div id="container">
  <div id="left">
   <p>Left content goes here.</p>
  </div><!-- left -->
  <div id="right1">
   <p>Right #1 content goes here.</p>
  </div><!-- right1 -->
  <div id="right2">
   <p>Right #2 content goes here.</p>
  </div><!-- right2 -->
  <div class="clear"></div>
 </div><!-- container -->
</body>
</html>