错误类型： java.lang.SecurityException: CSRF Security Error
出现错误的时候，修改web.xml配置文件，增加红色部分配置
<servlet>
<servlet-name>dwrinvoker</servlet-name>
<servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>crossDomainSessionSecurity</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<param-name>allowScriptTagRemoting</param-name>
<param-value>true</param-value>
</init-param>
</servlet>
prototype.js $F()函数解析
