You aren't going to get this with HTML alone. Some other software is going to have to be continually updating your files (or you are going to have to do it manually - security may proihibit this).
1. Have a set of charts stored on your server as image files, and pick the correct one according to what link the user (or PHP and MySQL) chooses.
The hard part is the source of the charts. I can't find any scripting languages that can create graphics.
Maybe you can find a general purpose programming language your ISP host lets you use that makes charts. Or you can make them with Excel and upload them.
Either way, you aren't going to get this with programs bought off the shelf. It's going to take some programming.
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