How do I apply write permissions

I am currently setting up a website using php and I want to use a scipt to upload files to a folder. But I need to give write permissions to that folder and when I asked my host providers they told me I needed to use an SSH. What I need to know is how to give a folder write permissions using this program?

Use command chmod.

ok fine, but then how what should I set the permission as, that link you gave me tells me nothing except what chmod is.

I need more help than this?

ok ive solved this now, i just used my ftp software instead