Introduction - If you have any usage issues, please Google them yourself
1, attached with Ajax application: user name exist and whether they meet the criteria for testing 2, attached to e-mail address to check, check user name, user password file to check a number of generic JS 3, with a presentation address 4, accompanied by compatible Multi-browser JS XmlHttpRequest object generated documents 5, with the use of CHM format detailed documentation 6, suitable for beginners reference to the use of Ajax