为什么JSON中的datetime在不同系统上的行为不同(win xp, server 2003)?

My Web Application is split up in a WebGui and an WebService. The WebService is responsible for Business Logic and Database handling. From Javascript in the Browser I request data depending on a date and time that is an input from the Browser. This request gous to an .asmx Url in the WebGui and inside this function the webservice is called.My Web Application is split up in a WebGui and