Removing specific QueryStrings
<p>Let's assume an aspx page gets multiple querystrings, for example <code>books.aspx?author=Arthor&amp;level=4&amp;year=2004</code>.</p>

<p>I'd like to create a button that clears specific querystring.</p>

<p>For example when <code>clearAuthorBtn</code> is clicked, user should be redirected to <code>books.aspx?level=4&amp;year=2004</code></p>

<p>How can I make it?
Thank you very much.</p>
