document.write("<div id='menu'><p><center><img src='/images/loading.gif' /><br />Now Loading...</center></p></div>");

new Ajax.Request("/board/menu.php", {
	onComplete:function(responseHttpObj){
		var div = document.getElementById("menu");
		var response = responseHttpObj.responseText;
		if(response)
			div.innerHTML = response;
		else{
			div.innerHTML = "";
			div.id = null;
		}
	}
});