I'm have created an ASP.NET website using .NET Diagram.  On my form, I have a textbox and submit button to allow the user to search a database for something that will produce the pages and links to create the diagram.  This works fine.

However, when the user wants to do additional searches while still on the page, the next diagram overlaps the first one.  This continues each time the user submits a new search while on the page.  When the user leaves this page and starts over, the first search works fine again.

Is there a way to clear the diagram so that it doesn't continue to overlap like this?