$(document).ready(function() {
    $('div.uk-map area').hover(
		function() {
		    var areaId = $(this).attr('areaId');
		    var hoverImgName = '/WoodlandTrust/Sites/AncientTreeHunt/Theme/Images/uk-map-' + areaId + '.png';
		    $(this).closest('div.uk-map').find('img').attr('src', hoverImgName)
		},
		function() {
		    $(this).closest('div.uk-map').find('img').attr('src', '/WoodlandTrust/Sites/AncientTreeHunt/Theme/Images/uk-map-00.png')
		}
	);
});