I tried access applet and test using Firefox, Internet Explorer and Google Chrome, but no access on NTNU didn't know where error.
About Symbols like $theta$ by EJS 4.3.1 the same error not work can't compile Symbols. [b][color=blue]( Symbols worked very well by EJS 4.3.0)[/color][/b]
However prof hwang i think can find where is error.
I just report my test.