Reducing code - array?

Reducing code - array?

Hi,

Maybe you can help me to reduce the code of a simple hover func.
I have a link on a graphical bar. When I hover over it, it should change
the background of the bar. As I have 7 different categories, the code
is getting long. So, perhaps there is a chance to shrink it a little bit:

$("a.message_overview").hover(
         function() {
            $('div.overview').css({backgroundPosition: '0 -88px'});      
         },
         function () {
            $('div.overview').css({backgroundPosition:"0 0"});
      });
      $("a.message_letter").hover(
         function() {
            $('div.letter').css({backgroundPosition: '0 -88px'});      
         },
         function () {
            $('div.letter').css({backgroundPosition:"0 0"});
      });
      $("a.message_event").hover(
         function() {
            $('div.event').css({backgroundPosition: '0 -88px'});      
         },
         function () {
            $('div.event').css({backgroundPosition:"0 0"});
      });


thanks
TC