Commonly, the "cursor:hand" style is used to mark an element as clickable, but this is not compatible with Mozilla browsers (read "Firefox".)  If you only need to support modern browsers, use "cursor:pointer".  If, however, you want to support all browsers, we need to turn to QuirksMode.  His solution:

p.pointerhand {
	cursor: pointer;
	cursor: hand;
}

As he points out, make sure you list the definitions in the order indicated (pointer, then hand.)