Cheers for the replies guys.
Yeah the EU (European Union) have said that we have to ask the viewers permission to store cookies, they have not said exactly what we have to do but some people have an opt out of cookies but explain that it may effect their visit to the site OR warn them that you are using cookies and do they accept, you also have to include what your cookies do (having this on a terms & conditions or info page is not acceptable.
Back to my original question though, Im helping out with a friends site and it needs to have this warning on there. I have created a css popup that appears when the page is opened with the relative info but I need it that if the viewer agrees by clicking YES (text link) that it will remember this and not show on any other page or on their next visit unless they delete their cookies.
The link to the sit is http://www.hudsonmotorcompany.co.uk
You will see the box at the top, if you click YES it will disappear but if you refresh it will reappear (don't want this) and if you click NO it'll bring another warning up and if they press CONTINUE it will mean they have agreed and do the same as YES.
PS - I have only attached to index page at the moment until I get this problem sorted so it at least has the warning there.