Add this code in portal_normal.vm file
<head>
$theme.include($top_head_include)
<script type="text/javascript" src="$javascript_folder/jquery-1.9.1.js"></script>
<link rel="stylesheet" href="$css_folder/colorbox.css" />
</head>
<head>
$theme.include($top_head_include)
<script type="text/javascript" src="$javascript_folder/jquery-1.9.1.js"></script>
<link rel="stylesheet" href="$css_folder/colorbox.css" />
</head>
