title: Popup window keeps opening after I close it and refresh the page?
body: <p>I have an aspx.cs page with the following code:</p>
  
  <pre><code>hypPopup.Attributes.Add("onclick",
                          "window.open('Popup.aspx',
                          '',
                          'height=650,
                           width=800,
                           location=no,
                           toolbar=no, 
                           status=no, 
                           scrollbars=yes, 
                           resizable=yes');
                           return false"
                           );
  </code></pre>
  
  <p>When I click the hypPopup link, the window pops up which is fine, but if I close it and refresh the page, the popup keeps popping up.  I have to leave the page and come back for it to stop popping up on every refresh.  Is this behavior by default or is there a fix to it?</p>
  
  <p>hypPopup.Attributes.Add is done in the Page_Load</p>