title: window.opener.location not working in IE
body: <p>I'm trying to redirect from child page to parent page with this javascript:</p>
  
  <pre><code>ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "Close", "ClosePopUp();", true); 
  
  
  &lt;script language="javascript" type="text/javascript"&gt;
      function ClosePopUp() {
          window.opener.location= 'ParentPage.aspx';
          self.close();
      }
  
  &lt;/script&gt;
  </code></pre>
  
  <p>It works with Firefox &amp; Chrome. But not with IE 9. 
  The error I'm getting is:</p>
  
  <p><code>Unable to get value of the property 'location': object is null or undefined</code></p>
  
  <p><code>alert(window.opener)</code> returns <code>null</code> in IE 9.</p>