Descriptor is a Tool meant for Data Validation and also has advanced features like Automatic Calendar Function   This is a Javascript file. The desciptor.js file is located in the Web files and stored under the JavaScript files This contains the code for validating site specific datafields like Decimal, Date only, Time Only, Date & Time, Integer, Money, Text Box, Dropdown List, US Phone, US Zip Code. The descriptor.js file will essentially reduce the size of the html page by reducing by as much as 70 % of the generated code Thus reduces the page-load time and enhances the throughput of pages