My problem is
I am using tree structured javascript. When i click on one tree link i am calling one servlet. If i click on the links with out gap i am getting org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:370)
and null pointer Exception.
The reason could be once i click one link it is calling one servlet and if click on other it is trying to call another servlet. it has to take time to call that servlet. So can u plz suggest me how to handle this probem. and i need to get the results instead of exception.

Thank you very much in advance.