How to get screen resolution of visitor in javascript and/or php?

Question

I would like to know the screen resolution of a visitor visiting my page so I can properly make a jquery thickbox cover about 75% of their screen.

Solutions to the q

Answer 1

In JavaScript it’s:

screen.width
screen.height

But PHP has no access to the client. So you need to pass the values gathered by JavaScript to your PHP script.

Additionally not every user has his windows in full screen mode. So you should better use the available window width/height.