title: Javascript breakpoints not working in modal dialog forms using IE 11 on Windows 8.1
body: <p>I have an aspx page with an associated javascript file which are loaded using showModalDialog. </p>
  
  <p>If I create a breakpoint in the javascript file, in a function called from onload on the aspx page, when debugging the breakpoint is never hit. </p>
  
  <p>Instead visual studio breaks and shows the line of code making the showModalDialog call.</p>
  
  <p>You can then continue and the form loads but the break point is never hit.  </p>
  
  <p>This is happening when using VS 2013 Update 4 with IE 11 in Windows 8.1. </p>