$(document).ready(function() {
	//do this stuff when the HTML is all ready
	$.getJSON("http://nuri.nric.or.kr/webzine/cnt.asp?callback=?"
		, { "vol" : vol, "menu_cd" : menu_cd, "submenu_cd" : submenu_cd }
		, function(data) {
				alert(data);
		}
	);
});