Conditional statements

Huh?

[Dabrowski]

Is there a reference somewhere for these?

I see [if IE] a lot, is there an [if MOZ]?

What are the most common ones?

[Fotiman]

These are called "Conditional Comments". They are an IE proprietary feature which lets you target certain IE browsers. Here's the Microsoft page about Conditional Comments:
[msdn.microsoft.com...]

[Dabrowski]

Cheers. I always wondered why people only used them for IE. Now I know.

[coopster]

The CSS Forum Library [webmasterworld.com] also has a A Guide to Using Microsoft Conditional Comments [webmasterworld.com] that you might find interesting.

[MatthewHSE]

I always wondered why people only used them for IE. Now I know.

You can also use them to target every browser *except* IE:

[webmasterworld.com...]

Works well if validation isn't vital for you.