title: How can I choose the location where I want to save downloaded files?
body: <p>I have a Grail application under Groovy.  I export an Excel file.  I can export a file if I mention the file location in the code, but I want to keep the user choose file location on his PC.  What is HTML or JavaScript to do this?  Do you have any code to help me?</p>
  
  <p>Thanks.</p>