Is it possible to combine classes? (can CSS do this?)

[prowsej]

Can I do the following: (I have the classes listed twice - is that legal?)

Could I do soemthing like:
.pmp, .jmp {border:0;}
.pmp {position:absolute;top:-30px;}
.jmp {position:relative;left:-1px;}

[tubedogg]

The first thing you can do (define multiple classes at once). But I'm quite sure you can't define a class twice or split it's definition into multiple blocks like that.