Details Collection Programme/Box

I require a box to appear when the consumer hits my site that will collect their name and email address if they decide to input it. Examples as seen at these sites: [login to view URL] [login to view URL] ## Deliverables I want a program to be written and put on my site that will collect the persoanl details of people that go to my site. When they get to the site the box should pop up and ask them for their name and email address. A function should also be built in so that if they input the email incorrectly, that it will prompt them to re-enter it. It should also ask them to confim they want to close it if they choose to do so before enting their details in. Examples of such a program are seen at these sites. When you go to the hom page the box pops up to collect the details: [login to view URL] [login to view URL]