title: How can I know when the IE file download prompt pop up?
body: <p>Now i have a problem below:</p>
  
  <p>i've added a div on my page to forbid user to click buttons, links or fields when user click the DOWNLOAD button. So i need to remove this div when the IE file download prompt pops up or when user clicks "save", "save as" or "cancel" on it.</p>
  
  <p>How can I reach this?</p>
  
  <p><strong>IE only considered please.</strong></p>