摘要：In Business Information Systems, data validation is the process of ensuring that a program operates on clean, correct and useful data. It uses routines, often called validation rules, that check for correctness or meaningfulness of data that are input to the system.This paper presents the main aspects in data validation. In the paper is exemplified some functions and methods for data validation in JavaScript. It is exemplified the usage of the theoretical tools by applying them on a few examples chosen from real applications.
