JS判断两种格式的输入日期的正确性

第一种

<script language=javascript>

String.prototype.isDate = function()

{

var r = this.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.getFullYear()==r[1]&&(d.getMonth()+1)==r[3]&&d.getDate()==r[4]);

}

alert("2002-01-31".isDate());

alert("2002-01-41".isDate());

</script>

第二种

<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>

判断数字用 isNaN()