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<!DOCTYPE html> <html> <body> <form action="form_action.asp"> Select files: <input type="file" id="myFile" name="files"> <input type="submit"> </form> <p>Click the "Try it" button to allow multiple values (files) for the file upload button.</p> <p>Try selecting more than one file when browsing for files before and after you have clicked on the "Try it" button. <strong>Tip:</strong> hold down CTRL or the SHIFT key while select, to select multiple files.</p> <button onclick="myFunction()">Try it</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("myFile").multiple = true; document.getElementById("demo").innerHTML = "The file upload button now accept multiple values."; } </script> </body> </html>