Perfect Format is compatible only with Internet Explorer browser, version 5.0 and higher. Perfect Format is an HTC (HTML Component) that formats and validates web page input, keystroke by keystroke as data is entered. Perfect Format decreases web page development time and increases web page usability. Phone numbers fields, numeric fields, Datum fields and many more input types can be masked so that input is controlled as data is entered. Perfect Format is changing the way developers think about web page design and it is changing the expectations of the web user. Perfect Format is easy to implement for web page designers and developers, requires little or no Programmierung and does not have to be installed on individual client Browser. NOTE: Some HTML experience is required to implement Perfect Format. Some vbscript or jscript experience may be required, depending upon the desired results. Free upgrades and support to registered users. 30 day money back guarantee.