1. At a computer system including a Web browser for browsing Web-based content, a method for caching tabular database data at the computer system for subsequent Web browser access, the method comprising: an act of sending a Web based request to a Web server in a specified domain, the Web based request requesting access to a Web page that includes a portion of a database, the database portion stored in a database accessible to the Web server; an act of receiving the database portion from the Web server; an act of locally storing the database portion at the computer system, the locally stored database portion locally accessible to the Web browser such that data from the locally stored database portion can be locally provided to the Web browser without the data being included in network based communication; an act of retaining an indication that the database portion was received from the specified domain to prevent Web servers in other domains from accessing the copy of the database.