New Post: How to provide search parameters to url input dialog?

Hi,

On several custom console pages I have an url input dialog to have the user select a frontend file:

<ui:fielddata>
    <ui:urlinputdialog handle="Composite.Management.FrontendFileSelectorDialog" value="<%= this.TocXSL %>" name="TocXSL" />
</ui:fielddata>

How do I make the dialog only show xsl files or css files par example.

thnx,
JamBo