This video will show you Selenium in action and also ACSPropel's methodology for managing test suites.
Selenium is a test tool for web applications. Selenium tests run directly in a browser, just as real users do. And they run in Internet Explorer, Mozilla and Firefox on Windows, Linux, and Macintosh. No other test tool covers such a wide array of platforms.
It used to be that we didn't even do browser-based functional testing.... the tools were way to flakey and cumbersome. Selenium is a jump ahead.