求助！对日期的检测格式为（yy/mm/dd）,那位大侠给出相应的javascript代码

Question

<script language=javascript>
function strDateTime(str)
{
   var r = str.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/); 
   if(r==null)return false; 
   var d= new Date(r[1], r[3]-1, r[4]); 
   return (d.getYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);
}
alert(strDateTime("02-01-31"));
alert(strDateTime("03-01-41"));
</script>

Answer 1

<script language=javascript>
function strDateTime(str)
{
   var r = str.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2})$/); 
   if(r==null)return false; 
   var d= new Date(r[1], r[3]-1, r[4]); 
   return (d.getYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);
}
alert(strDateTime("02/01/31"));
alert(strDateTime("03-01-41"));
alert(strDateTime("03/01/41"));
</script>