How to set a value to a file input in HTML?

Question

How can I set the value of this?

<input type="file" /> 

Answer 1

You cannot, due to security reasons.

Imagine:

<form name="foo" method="post" enctype="multipart/form-data">     <input type="file" value="c:/passwords.txt"> </form> <script>document.foo.submit();</script> 

You don't want the websites you visit to be able to do this, do you? =)

Answer 2

You can't.

The only way to set the value of a file input is by the user to select a file.

This is done for security reasons. Otherwise you would be able to create a JavaScript that automatically uploads a specific file from the client's computer.