Any simple way to add a scrolling action to a drop-down list?

[Ray.H]

@Mittineague

The HTML is not well-formed, let alone valid.
TBH I’d be surprised if it would even render halfway decently.

@coothead

Has the rest of the document been coded in a similar vein?

I suspect that invalid markup is the cause of the OP’s other problems as well. Hard to say for sure when they don’t reply back or show the entire code.

The OP’s time would be best spent learning to write valid html first. Then they would see the css problems decline.