$(function(){
	$("#areaMap div").each(function(){
		var f = $(this).attr("class");
		var n = f.substring(2,3);
		
		$("<img>").attr("src","../images/floor/no_"+n+"ov_off.gif");
		
		$(this).hover(
			function(){
				$(this).find("img").attr("src","../images/floor/no_"+n+"ov_off.gif");
				$(this).addClass("no"+n+"ov");
			},
			function(){
				$(this).find("img").attr("src","../images/floor/no_"+n+".gif");
				$(this).removeClass("no"+n+"ov");
			}
		);
	});
});