Example 1

This is an example form intended to demonstrate the security issues involved with opacity applying to file upload controls. This technique has been based on, and modified slightly from the demonstration by Peter-Paul Koch.

This form will submit to the W3C Markup Validator. No file that you enter will be stored anywhere on my system, but I recommend you only provide the path of a simple HTML file of your choice, just to prove that this will actually upload the file.

See example 2 for a semi-transparent file upload control to help see how this technique works.