javascript在线api：http://doc.51windows.net/jscript5/?url=/jscript5/html/jsmthfEncodeURI.htm
最好用的CHM格式API文档：
http://www.javatang.com/_download/jdk150.ZH_cn.rar
http://www.javatang.com/_download/jdk6.ZH_cn.rar
J2SDK & API下载
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http://java.sun.com/j2se/1.3/download.html
http://java.sun.com/j2se/1.4.2/download.html
http://java.sun.com/javase/downloads/index_jdk5.jsp
http://java.sun.com/javase/downloads/index.jsp
J2EE DK & API下载
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http://java.sun.com/j2ee/1.3/index.jsp
http://java.sun.com/j2ee/1.3/download.html
http://java.sun.com/j2ee/1.4/index.jsp
http://java.sun.com/j2ee/1.4/download.html
http://java.sun.com/javaee/downloads/index.jsp
http://developers.sun.com.cn/
JDK1.6API中文版（全）
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* HTML 格式(在线英文) http://java.sun.com/javase/6/docs/
* HTML 格式(在线中文) http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/publish/1.6.0/html/zh_CN/api/index.html
* zip 格式(中文) http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/publish/1.6.0/html_zh_CN.zip
* CHM 格式(中文) http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/publish/1.6.0/chm/JDK_API_1_6_zh_CN.CHM
JDK1.5API中文版（全）
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* HTML 格式(在线英文) http://java.sun.com/javase/5/docs/
* HTML 格式(在线中文) http://gceclub.sun.com.cn/Java_Docs/html/zh_CN/api/index.html
* zip 格式(中文) http://gceclub.sun.com.cn/Java_Docs/html_zh_CN.zip
* CHM 格式(中文) http://download.java.net/jdk/jdk-api-localizations/jdk-api-zh-cn/builds/JDK_API_1_5_zh_CN.CHM javascript
文章转自：http://ygxu.iteye.com/blog/390356html