title: Javascript opening new window targeting a PDF
body: <p>I have a chained dropdown box that pieces together a download string from a group of strings...</p>
  
  <p>e.g.  </p>
  
  <pre><code>string1 = "a4";
  string2 = "_landscape";
  string3 = "_lovely";
  string4 = ".pdf";
  
  totalString = string1 + string2 + string3 + string4;
  window.open(totalString);
  </code></pre>
  
  <p>This works a treat in FireFox, but in IE I get the following error on the original window (even though the PDF opens in a new window):</p>
  
  <blockquote>
    <p>405 - HTTP verb used to access this
    page is not allowed. The page you are
    looking for cannot be displayed
    because an invalid method (HTTP verb)
    was used to attempt access.</p>
  </blockquote>
  
  <p>I have a feeling that this is "Headers" based, but I'm not 100% sure - can anyone help?</p>
  
  <p>Cheers!</p>