var Worldmap = new function() {

  this.data = {
      'no_selection':   'images/world-imagemap/big_no_selection.gif',
      'north_america':  'images/world-imagemap/big_north_america.gif',
      'south_america':  'images/world-imagemap/big_south_america.gif',
      'europe':         'images/world-imagemap/big_europe.gif',
      'east_europe':    'images/world-imagemap/big_east_europe.gif',
      'middle_east':    'images/world-imagemap/big_middle_east.gif',
      'africa':         'images/world-imagemap/big_africa.gif',
      'asia':           'images/world-imagemap/big_asia.gif',
      'fsu':            'images/world-imagemap/big_fsu.gif',
      'australia':      'images/world-imagemap/big_australia.gif'
  };
  
  this.init = function() {
      // mouseenter event
      $('#worldmap area').mouseenter(function() {
          $('#worldmap_image').attr('src', Worldmap.data[$(this).attr('id')]);
      });

      // mouseleave event
      $('#worldmap area').mouseleave(function() {
          $('#worldmap_image').attr('src', Worldmap.data['no_selection']);
      });
  };
};