JavaScript 获取当前年月日及星期几的实现方法

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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>获取年月日星期</title>
<script type="text/javascript" language="javascript" >
function getDateWeek()
{
todayDate = new Date();
date = todayDate.getDate();
month= todayDate.getMonth() +1;
year= todayDate.getYear();
var dateweek = "今天是:";
if(navigator.appName == "Netscape")
{
  dateweek = dateweek + (1900+year) + "年" + month + "月" + date + "日 ";
}
if(navigator.appVersion.indexOf("MSIE") != -1)
{
  dateweek = dateweek + year + "年" + month + "月" + date + "日 ";
}
switch(todayDate.getDay())
{
case 0:dateweek += "星期日";break;
case 1:dateweek += "星期一";break;
case 2:dateweek += "星期二";break;
case 3:dateweek += "星期三";break;
case 4:dateweek += "星期四";break;
case 5:dateweek += "星期五";break;
case 6:dateweek += "星期六";break;
}
return dateweek;
}
document.write(getDateWeek());
</script>
</head>
<body >
</body>
</html>