оно???
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
body
{
margin: 0px;
padding: 0px;
}
div
{
width: 100%;
height: 500px;
}
iframe
{
width: 100%;
height:100%;
border: 0px;
}
</style>
</head>
<body>
<div>
<iframe src="http://htmlbook.ru/" style=""></iframe>
</div>
</body>
</html>