title: ASP.Net ReportViewer - Cannot hide the document map
body: <p>I have an .aspx page that contains a <code>ReportViewer</code> control. The report displays properly, but I cannot get the document map to disappear. If you look at the two following images:</p>
  
  <p><img src="https://i.stack.imgur.com/OIzGI.png" alt="Doc map expanded">
  <img src="https://i.stack.imgur.com/DRQAG.png" alt="Doc map collapsed"></p>
  
  <p>You can see that the toggle button exists, but when I click it nothing happens. I also tried this in chrome with the developer console enabled and there were no javascript errors.</p>
  
  <p>Any thoughts on what I may need to do to fix this issue?</p>