请问一下错在什么地方了?还有学习javascrip有什么好方法

请教一下错在什么地方了?还有学习javascrip有什么好方法?
<script language="JaveScript1.2">
var isnMonth=new Array("1月"，"2月"，"3月"，"4月"，"5月"，"6月"，"7月"，"8月"，"9月"，"10月"，"11月"，"12月");
var isnDay=newArray("星期一","星期二","星期三","星期四","星期五","星期六","星期日");
today=new Date();
Year=today.getYear()
Date=today.getDate();
if(document.all)document.title="今天是:"+Year+"年"+isnMonth[today.getMonth()]+Date+"日"+isnDay[today.getDay]


[解决办法]

JScript code

<script>var isnMonth=new Array("1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月");var isnDay=new Array("星期一","星期二","星期三","星期四","星期五","星期六","星期日");today=new Date();Year=today.getFullYear()D=today.getDate();document.title="今天是:"+Year+"年"+isnMonth[today.getMonth()]+D+"日"+isnDay[today.getDay()]</script>