Date的对象有错？

var d= new Date(2000,10,21);
var SY = d.getYear();
var SM = d.getMonth();
var SD = d.getDate();
alert(SY+'年'+SM+'月'+SD+"日");

返回的是100年10月21日

http://developer.irt.org/script/1037.htm

另外附上ECMA标准中对getYear()的定义：

Date.prototype.getYear ( )
NOTE The getFullYear method is preferred for nearly all purposes,
because it avoids the  year 2000 problem.
When the getYear method is called with no arguments the following
steps are taken:
1. Let t be this time value.
2. If t is NaN, return NaN.
3. Return YearFromTime(LocalTime(t)) - 1900.

所以，当年份是2004的时候，标准定义的返回是104。

var d= new Date(2000,10,21);
var SY = d.getFullYear();
var SM = d.getMonth();
var SD = d.getDate();
alert(SY+'年'+SM+'月'+SD+"日");

Donews注册用户的错误

if( eval( year.value ) > eval( d.getYear() ) || 1900 > eval( year.value ) ){
				sErr += "\n  *不是吧，请检查一下年份！ ^_^" ;
				alert( sErr ) ;
				year.focus();
				return false ;
			}