Lag issues, please help.

Ok, so I like to play the online MMORPG Runescape. It's a browser-based Java game. Has very low system requirements which my late '09 MBP exceed.

The problem is it lags...a lot. I have personally come to the conclusion that it's my ISP's fault and that there's nothing I can do about it, but then again I don't know all the techniques for testing the connection.

The game itself lags, but other things that require the internet do not. I'm able to play CS:S without any problems. Loading pages works perfectly. But the game stutters for whatever reason. I click and then wait a few seconds and then my character takes action. The lag is intermittent...maybe for a few minutes actions will be immediate, then I'll get stutters. I'll disconnect (indicating a lack of connection to the internet) but be able to stream a YouTube video.

I don't know if there is something I can do on my end or not.

I've found that in the early morning I do not experience this lag, but as the day goes on it gets worse and worse. It's not yet late (midnight onwards) so I'll update later when I assume less people are using the internet to see if that's the reason.

Otherwise, please leave any suggestions and possibly solutions.

Thanks.

Sounds more like the Runescape server is being overloaded and not able to handle the demand.

I would agree but I've tried playing on multiple servers.

Some in England, some in the US and some in Australia.

I'm in the Philippines at the moment.

All have the same problem.

Very well could be an ISP issue during certain periods of the day when their network is being overloaded then.

Can you think of anything I could do on my end that might improve things?

Because just looking at it, it really does look like an ISP thing.