Custom Back button - Opening report in same window

When you create a dashboard and you have a drill down report the drill down report opens in the same window. So when you hit the return link the drill down report also closes. Thats fine a back button can be placed in the answers request also when there are No Results a custom no results page can be added to look exactly the same but with a back button too.

Insert a static text box "contains HTML Markup" into answers request.

<table align="left">
<tr >

<td>

        <a href="javascript:history.back();">Back</a>

</td>

</tr>
</table>

Try this..It works.