$(function(){
	
	$.fn.preload = function() {
		this.each(function(){
			$('<img/>')[0].src = this;
		});
	}

	// Usage:

	$(['/images/map_na.jpg','/images/map_as.jpg','/images/map_uk.jpg','/images/map_eu.jpg']).preload();

	
	$('#dotmap area').mouseover(function(){
	
		var area = $(this).attr('alt').replace('area_','');
	
		$('#dotMapImage').attr('src','/images/map_'+area+'.jpg');

		$('#box_'+area).show();

	}).mouseout(function(){
		
		$('#dotMapImage').attr('src','/images/map.jpg');
		$('.map_box').hide();
		
	}).mousemove(function(e){
		
		$('.map_box').css({
			
			top: (e.pageY+10)+'px',
			left: (e.pageX-360)+'px'
		});
		
	});
	
});