Mounting question

[wajed]

Hi,

I would like to make a mount for my LCD monitor since there aren't any mounts here.

I want the mount to go up and down, left and right, far and close.

This one: http://www.amazon.co.uk/gp/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2Fgp%2Fproduct%2FB000ID7QNI%3Fpf_rd_m%3DATVPDKIKX0DER%26pf_rd_s%3Dcenter-6%26pf_rd_r%3D07XVP2QMNH6W210T0P4N%26pf_rd_t%3D101%26pf_rd_p%3D470938731%26pf_rd_i%3D507846&tag=diydoctor&linkCode=ur2&camp=1634&creative=6738 is easy to make, since gravity has nothing to do with it.

But if I want to make a similar one that also goes up and down, I won't be able to simply copy the way it moves left and right, because gravity will make the face of the monitor go all the way toward the ground. So, what can I do? How can I make it stop where I want it to stop.

I hope what I'm saying is clear, if not I'll try my best to explain. Thank you.