I would say that, having fairly general programming experience, 15 days would be quite enough to learn it to the degree when you are able to write sensible code. Especially it it true for jQuery, because it, like all library, should not be "learned" (what is is, for a library?
); instead, you just need to understand the idea and only know where to look for the reference information.
Having said that, I have a serious doubt that you personally can do that. I can explain why, this is in your question: