Sort of a newb question, here.
I have a website I sell services on and need a way to add a required field above the checkout, before my customers proceed.
Take a look at this site, for example: F Fans
These guys sell twitter followers and require a website URL to be entered, before clicking on the PayPal checkout button.
I need to add a required field in my checkout process, as well.
I've heard there are a few sites that allow people to share completed pieces of code and scripts that are free to use.
Can anyone recommend some good sites where I might find a script for something like this? Or better yet, how to add a field like this?