Set cursor to pointer on all rows in a particular table

Set cursor to pointer on all rows in a particular table

I'd like to change the mouse cursor to a pointer for the rows in a particular table but I'm not having any luck getting it to work.  Here are some of the things I have tried, but the cursor resolutely refuses to change for me:

                $("#firmtable tr").hover(function() {
                    $(this).css("cursor","pointer");
                }, function() {
                    $(this).css("cursor","default");
                });

$("#firmtable tr").css("cursor","pointer");

Nothing I have tried has made any change at all.

Thanks