CSS: Dash or Underscore?

[freshJet]

I've seen this discussed elsewhere but wondered what our phpVMS developers' preferences are. Personally I use dashes, but I use underscores in image filenames.

For those confused, by element name I mean:

#main {}

So, for example, do you use:

#main-div {}

or

#main_div {}

?

[BaRBeR]

I dont really know why, I think I just do it out of force of habit but I use underscores :L

[magicflyer]

I prefer _ just because I tend to use them a lot in OOP.

[Vangelis]

I also use underscore as i think it is easyer to catch it with your eye

[Tom]

Underscore is messy IMO... always a dash in CSS for me.

Also just noticed your examples all use IDs - best practice is to never use IDs in CSS - to override the style of an ID you need 256 classes - so stick to just using classes as much as possible.