[quote author=sithy link=topic=1100.msg4173#msg4173 date=1240855791]
Is it legal to display the simulations in my site?
[/quote]

http://www.um.es/fem/EjsWiki/index.php/Main/ConditionsOfUse
Authors can distribute any simulation that they create using EJS, provided [color=blue][b]a reference to this fact is included, together with a link to the official Web page for EJS: http://fem.um.es/Ejs.[/b][/color] It is not necessary to include this reference in all pages with a simulation on it of an educational unit. Including a reference for the whole set in a clearly visible place will suffice.


My thoughts:
Perhaps you should change "Created with Easy Java Simulations" to "Created with [url=http://www.um.es/fem/EjsWiki/index.php/Main/HomePage]Easy Java Simulations [/url] with the link.? To help spread the use of Ejs!


In addition, it would be integrity of your character to guide you in your actions.
for example, if you use other authors source codes like Prof Hwang's,  This work is licensed under a Creative Commons Attribution 2.5 Taiwan License.

http://creativecommons.org/licenses/by-sa/2.5/tw/deed.en
You are free:

    * to Share to copy, distribute and transmit the work
    * to Remix to adapt the work
    *

Under the following conditions:

[b]    *Attribution You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).[/b]


This varies from author to author so need to check with authors when in doubt?

Like mine is

Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 Singapore License.

You are free:

    * to copy, distribute, display, and perform the work
    * to make derivative works
    *

Under the following conditions:

    * Attribution. You must give the original author credit.

Basically i same as Prof Hwang's.

But if you are more restrictive to sharing, there are others licenses like

Creative Commons License
This work is licensed under a Creative Commons Attribution-Share Alike 3.0 Singapore License.