Hi,
I don't want to step on your toe, but 250 pounds is far to much for this kind of project...
If you would lower the budget or recreate this project and invite me for it, I would do it for 50, but right now I can't even bid lower than your minimum budget.
And could you also please show me the website for which it need to be done and also if/what cms it uses, eg. joomla, wordpress, etc., if you consider me doing this task for you.
My approach would be purely javascript/jquery without database access and if the user click to hide the message, it will create a cookie for, lets say 30 days, so he won't see the message anymore. But this is only meant for this small script to warn the visitor. If you also need the cookie page itself with introduction, how to use, etc. I will need to reconsider my bid accordingly, after you provide me with some more detailed specifications....
Thank You!
Kind regards,
Thomas