怎么判断一个字符串是否日期

Question

http://expert.csdn.net/Expert/topic/1334/1334036.xml?temp=.4580805

Answer 1

http://expert.csdn.net/Expert/topic/1078/1078862.xml?temp=.458172

Answer 2

<script language=javascript>
function strDateTime(str)
{
   var reg = /^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/; 
   var r = str.match(reg); 
   if(r==null)return false; 
   var d= new Date(r[1], r[3]-1,r[4]); 
   var newStr=d.getFullYear()+r[2]+(d.getMonth()+1)+r[2]+d.getDate()
   return newStr==str
}
alert(strDateTime("2002-1-31"))
alert(strDateTime("2002-1-41"))
</script>