I want to know how can we prevent the overlay in greybox I cant figure out the way to achieve it.

I am using the following code to include greybox in my page:

<script type="text/javascript">
 var GB_ROOT_DIR = "greybox/";
</script>

<script type="text/javascript" src="greybox/AJS.js"></script>
<script type="text/javascript" src="greybox/AJS_fx.js"></script>
<script type="text/javascript" src="greybox/gb_scripts.js"></script>
<link href="greybox/gb_styles.css" rel="stylesheet" type="text/css" media="all" />