时间验证

  if(!isDate($get("<%=tb_birth.ClientID %>").value)){
                alert("请输入正确的生日格式！（如：1950/10/1）") ;
                $get("<%=tb_birth.ClientID%>").focus();
                return false;
            }

 function isDate(dateStr)
        {
            var datePat = /^(\d{4})(\/)(\d{1,2})(\/)(\d{1,2})$/;
            var matchArray = dateStr.match(datePat);
            if (matchArray == null) return false;
            var month = matchArray[3];
            var day = matchArray[5];
            var year = matchArray[1];
            if (month < 1 || month > 12) return false;
            if (day < 1 || day > 31) return false;
            if ((month==4 || month==6 || month==9 || month==11) && day==31) return false;
            if (month == 2)
            {
                var isleap = (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
                if (day > 29 || (day==29 && !isleap)) return false;
            }
            return true;
        }