[From WebReference]
Developing a robust, interactive and engaging Web site involves many different avenues, such as interactive pop-out menu’s using dynamic JavaScript, Cascading Style Sheets (CSS), complex maps that allows visitors to rollover individual sections for detailed information, forms designed and formatted with CSS and areprogrammed to collect and send visitor feedback to a specified recipient. Other features could include: database driven pages that display a current member directory, a customized blog section that enables administrators to manage postings and allow random users in coordination with CAPTCHA techniques to post remarks to an article. Arguably, one of the most popular features of any database driven site is a searchable form feature that allows anyone to search for current staff members of an organization and find additional information, such as their email address or phone number.
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http://www.webreference.com/programming/php/search/