Thanks prof
I have just one comment about [b]./[/b] when i add this in code and variable panel ejs print message [b]Required files not found [/b]
So l delete [b]./[/b] and change to [b]"_data/photoelectric/0.gif"[/b] i also delete from code [b]./[/b] to become like it
   material = "_data/photoelectric/sodio.gif";
   potencialcorte = 2.28;
   material = "_data/photoelectric/cesio.gif";
   potencialcorte = 2.1;
So after run applet work fine and message not appear again i didn't know what the reason, but now is work fine!

/htdocs/ntnujava/ejsuser/37048/users/egy/ahmed/qm_photoelectric_pkg/qm_photoelectric.propertiesFull screen applet or Problem viewing java?Add to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
Download EJS jar file(1441.9kB):double click downloaded file to run it. (17 times by 10 users) , Download EJS source (7 times by 5 users) View EJS source