The following code shows how to create fluid grid.
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css"
href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.min.css">
<style type='text/css'>
.row-fix {<!-- ww w . j av a 2s.c o m-->
margin-bottom: 20px;
}
.row-fix>[class*="span"] {
height: 100px;
background: #f1f1f1;
}
.row-fix .two-col {
background: none;
}
.two-col>[class*="col"] {
height: 40px;
background: #ccc;
}
.two-col>.col1 {
margin-bottom: 20px;
}
</style>
</head>
<body style='margin:30px'>
<div class="row row-fix">
<div class="span5">span5</div>
<div class="span3">span3</div>
<div class="span2 two-col">
<div class="col1">span2</div>
<div class="col2">span2</div>
</div>
<div class="span2">span2</div>
</div>
<div class="row row-fix">
<div class="span6 two-col">
<div class="col1">span6</div>
<div class="col2">span6</div>
</div>
<div class="span6">span6</div>
</div>
</body>
</html>