Thanks prof!!! u r the best

BTW ( by the way)
how do i combined the efforts by

This is a Graphic User Interface for Physlet builder
Physlet is java library for physics simulation created by Wolfgang Christian at Davidson College in the U.S.

into the EJS builder ?

I want to be able to make field lines drawn exactly the way it is drawn by  Physlet builder  ;D

most teachers want to concentrate on teaching instead of coding.

can the Physlet builder and EJS builder complement each other ?

i am studying your source code xml now :) thanks!