What Coding Language To Pursue Further?

[Masked Crusader]

Hello ladies and gentlemen.

College classes have started back up for me and I am noticing that I have a VERY light load this semester. With that being said, there are a couple 2-3 classes that I have the ability to add on. I was looking into the web programming classes that are available. The most popular seem to be pHp, Javascript, and Actionscript (Flash's scripting language).

I know for a fact that I want to develop my Actionscript knowledge to make me more proficient in my scripting for that program specifically.

Now, the issue that I seem to be having is trying to figure out whether pHp or Javascript would be more beneficial in vBulletin skin design. I do create my own skin designs and I am already proficient in the design end of the spectrum. Just need to really hone in on my coding abilities.

Anyways, Javascript versus pHp for vBulletin skin design? What is your take?

Please provide reasoning as to why you believe the language you choose would be best to pursue further.

Thank you all very much for your time and look forward to hearing responses.