Drupal.behaviors.clean = function(context) {
$('#north').mouseover(function()
{
  // do my image switching logic here.
   $('#league').css("background-position", "-800px 64px");
  
});

$('#north').mouseout(function()
{
  // do my image switching logic here.
  $('#league').css("background-position", "0 64px"); 
});

$('#yorkshire').mouseover(function()
{
  // do my image switching logic here.
  $('#league').css("background-position", "-1600px 64px"); 
});

$('#yorkshire').mouseout(function()
{
  // do my image switching logic here.
  $('#league').css("background-position", "0 64px"); 
});
}