window.addEvent('domready', function() {
			var flash_box = $$('.flash_box')[0];
			var as = $$('.header_content_left li');

			var i = 0;
			$each(as, function(/* Element */item) {
						item.addEvents({
									mouseenter : function() {
										flash_box
												.setStyle(
														'backgroundPosition',
														'50% '
																+ (-(num * 293) + 'px'));
									},
									mouseleave : function() {
										flash_box.setStyle(
												'backgroundPosition', '');
									}
								});
						var num = i++;
					});
		});