Опять-таки, а зачем тут яваскрипт?
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<style type="text/css">
.wrapper {
margin: 0px 0px 0px 300px;
border: solid black 2px;
}
* html .wrapper { /* IE6 */
height: 0px;
}
.column {
display: inline;
float: left;
width: 293px;
margin: 0px -293px -4px 0px;
position: relative;
left: -300px;
top: -2px;
}
.block1 {border: solid red 2px; margin: 0px 0px 5px 0px;}
.block2 {border: solid blue 2px; margin: 0px 0px 5px 0px;}
.block3 {border: solid green 2px; margin: 0px 0px 0px 0px;}
.content {
display: inline;
float: left;
}
.clear {
height: 0px;
overflow: hidden;
clear: both;
}
</style>
</head>
<body>
<div class="wrapper">
<div class="column">
<div class="block1">ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU </div>
<div class="block2">ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU </div>
<div class="block3">ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU ETAOIN SHRDLU </div>
</div>
<div class="content">Lorem Ipsum dolor sit amet.</div>
<div class="clear"></div>
</div>
</body>
</html>