<script language=javascript>
String.prototype.isTime = function()
{
var r = this.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/);
if(r==null)return false; var d = new Date(r[1], r[3]-1,r[4],r[5],r[6],r[7]);
return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]&&d.getHours()==r[5]&&d.getMinutes()==r[6]&&d.getSeconds()==r[7]);
}
alert("2002-1-31 12:34:56".isTime());
alert("2001-2-29 12:54:56".isTime());
alert("2002-1-41 12:00:00".isTime());
</script>
String.prototype.isTime = function()
{
var r = this.match(/^(\d{1,4})(-|\/)(\d{1,2})\2(\d{1,2}) (\d{1,2}):(\d{1,2}):(\d{1,2})$/);
if(r==null)return false; var d = new Date(r[1], r[3]-1,r[4],r[5],r[6],r[7]);
return (d.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]&&d.getHours()==r[5]&&d.getMinutes()==r[6]&&d.getSeconds()==r[7]);
}
alert("2002-1-31 12:34:56".isTime());
alert("2001-2-29 12:54:56".isTime());
alert("2002-1-41 12:00:00".isTime());
</script>
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