check if a button is pressed??

[Locoboy]

Is it possible to make a PHP code that checks if the shift button is pressed?

I want to use it for a page where users have to fill in some fields, and they have to hold the SHIFT key when they click on the submit button. If they don't, a message will be displayed saying that they have to press the SHIFT key.

Can anybody tell me how to do it? or is it only possible using Javascipt???

[stolzyboy]

i would imagine it would only be possible with javascript, anyway, why would you want to do it server side, client side makes more sense, then alert something and don't submit the info