Licences for jQuery Plugins

Could you go into a little bit more detail?

I understood your question as such:

"I am creating a jQuery plugin. Some of the code contained in my plugin is from other plugins. The code snippets from other plugins each have their own licence types. How do I legally use these sections of code from other jQuery plugins within the jQuery plugin that I am coding?"

Answer: It depends on each individual license type and the intended application of your plugin.

Are you selling your plugin or giving it away for free? Is your plugin geared towards commercial use or personal use or both?

Let's say for easy example:

Situation - You are using plugins/code sections that you allowed to use for non-commercial use. You are using these plugins/code to create a non-commercial use plugin.

Solution - In the packaging of your plugin (.rar file or .zip file) include a license.txt file in which you document which code(s) and plugin(s) you used in the creation of your plugin and where the user can locate the original code(s) and/or plugin(s) as well as the license type(s) and restriction(s) or allowed use(s) of those plugin(s) and code(s).

Reason - Not everyone does it this way but I would highly recommend it for a number of reasons. 1) You can revisit your projects at a future date and modify them easily. 2) You're paying dues to those whose work you built on. 3) You're keeping everyone happy. 4) You're providing clear documentation of your lawful usage intent of the created content. 5) Prevents you from being sued or having to deconstruct your creations. 6) You're helping other developers.

You can also include comments within the code structure itself documenting where the code came from and the license used. Really only useful if the user will be able to see the source code - though I would also include it within the source code regardless for the same reasons as above.

Did I understand your question properly?