Java using Ajax to achieve a drop down box 3

ajax_dwr
........\.classpath
........\.myeclipse
........\.mymetadata
........\.project
........\.settings
........\.........\.jsdtscope
........\.........\com.genuitec.eclipse.migration.prefs
........\.........\org.eclipse.jdt.core.prefs
........\.........\org.eclipse.wst.jsdt.ui.superType.container
........\.........\org.eclipse.wst.jsdt.ui.superType.name
........\src
........\...\com
........\...\...\cn
........\...\...\..\entity
........\...\...\..\......\City.java
........\...\...\..\......\Prvi.java
........\...\...\..\......\User.java
........\...\...\..\s
........\...\...\..\servlet
........\...\...\..\.......\Lian.java
........\...\...\..\.......\PrviServlet.java
........\...\...\..\.\Service.java
........\...\META-INF
........\...\........\MANIFEST.MF
........\WebRoot
........\.......\hello1.jsp
........\.......\index.jsp
........\.......\lian.js
........\.......\lian1.jsp
........\.......\META-INF
........\.......\........\MANIFEST.MF
........\.......\prvi.js
........\.......\prvi1.js
........\.......\prvi1.jsp
........\.......\Sheng.jsp
........\.......\WEB-INF
........\.......\.......\classes
........\.......\.......\.......\com
........\.......\.......\.......\...\cn
........\.......\.......\.......\...\..\entity
........\.......\.......\.......\...\..\......\City.class
........\.......\.......\.......\...\..\......\Prvi.class
........\.......\.......\.......\...\..\......\User.class
........\.......\.......\.......\...\..\s
........\.......\.......\.......\...\..\servlet
........\.......\.......\.......\...\..\.......\Lian.class
........\.......\.......\.......\...\..\.......\PrviServlet.class
........\.......\.......\.......\...\..\.\Service.class
........\.......\.......\.......\META-INF
........\.......\.......\.......\........\MANIFEST.MF
........\.......\.......\dwr.xml
........\.......\.......\lib
........\.......\.......\...\commons-logging-1.0.4.jar
........\.......\.......\...\dwr.jar
........\.......\.......\...\log4j-1.2.15.jar
........\.......\.......\web.xml

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