改めてJavaScript(4)

これで、test()を実行しても、動きません。なんでか？

function getCalender(){

date = new Date();

year = (date.getYear())+1900;

month = (date.getMonth())+1;

day = date.getDate();
youbi_ja = new Array("日","月","火","水","木","木","金","土");

youbi_en = new Array();

//

youbi_flag = 0;

switch(youbi_flag){

	case 0:

		var youbi = youbi_ja[date.getDay()];

		break;

	case 1:

		var youbi = youbi_en[date.getDay()];

		break;

	default:

		alert("error");

		break;

}
}
function test(){

	getCalender();

	alert(year + "年" + month + "月" + day + "日" + youbi +"曜日");

}