最好的网络编程教程网站w3schools

http://www.w3schools.com (不要漏了schools的复数，否则就转到另一个粗制滥造的网站上去了。)
The best things in life are free.

最全面的网站编程相关的教程和参考。包括
HTML Tutorials
Learn HTML
Learn XHTML
Learn CSS
Learn TCP/IP

XML Tutorials
Learn XML
Learn XSL
Learn XSLT
Learn XSL-FO
Learn XPath
Learn XQuery
Learn XLink
Learn XPointer
Learn DTD
Learn Schema
Learn XML DOM
Learn XForms
Learn SOAP
Learn WSDL
Learn RDF
Learn RSS
Learn WAP
Learn Web Services

Browser Scripting
Learn JavaScript
Learn HTML DOM
Learn DHTML
Learn VBScript
Learn AJAX
Learn AppML
Learn E4X
Learn WMLScript

Server Scripting
Learn SQL
Learn ASP
Learn ADO
Learn PHP

.NET (dotnet)
.NET Microsoft
.NET ASP
.NET Mobile

Multimedia
Learn Media
Learn SMIL
Learn SVG
Learn Flash

Web Building
Web Building
Web W3C
Web Browsers
Web Quality
Web Semantic
Web Careers
Web Hosting
Web Certification

最富特色的是具有脚本的实时编写和显示功能，用户即使没有编辑器也可以马上实验脚本的执行结果。