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<script language="javascript">
function chkDate(obj) {
var input = obj.value.replace(/-/g,"");
var inputYear = input.substr(0,4);
var inputMonth = input.substr(4,2) - 1;
var inputDate = input.substr(6,2);
var resultDate = new Date(inputYear, inputMonth, inputDate);
if ( resultDate.getFullYear() != inputYear ||
resultDate.getMonth() != inputMonth ||
resultDate.getDate() != inputDate) {
obj.value = "";
} else {
obj.value = inputYear + "-" + input.substr(4,2) + "-" + inputDate;
}
}
</script>

<script language="javascript"> function chkDate(obj) { var input = obj.value.replace(/-/g,""); var inputYear = input.substr(0,4); var inputMonth = input.substr(4,2) - 1; var inputDate = input.substr(6,2); var resultDate = new Date(inputYear, inputMonth, inputDate); if ( resultDate.getFullYear() != inputYear || resultDate.getMonth() != inputMonth || resultDate.getDate() != inputDate) { obj.value = ""; } else { obj.value = inputYear + "-" + input.substr(4,2) + "-" + inputDate; } } </script>

<script language="javascript">
function chkTime(obj) {
var input = obj.value.replace(/:/g,"");
var inputHours = input.substr(0,2);
var inputMinutes = input.substr(2,2);
var inputSeconds = input.substr(4,2);
var resultTime = new Date(0,0,0, inputHours, inputMinutes, inputSeconds);
if ( resultTime.getHours() != inputHours ||
resultTime.getMinutes() != inputMinutes ||
resultTime.getSeconds() != inputSeconds) {
obj.value = "";
} else {
obj.value = inputHours + ":" + inputMinutes + ":" + inputSeconds;
}
}
</script>

<script language="javascript"> function chkTime(obj) { var input = obj.value.replace(/:/g,""); var inputHours = input.substr(0,2); var inputMinutes = input.substr(2,2); var inputSeconds = input.substr(4,2); var resultTime = new Date(0,0,0, inputHours, inputMinutes, inputSeconds); if ( resultTime.getHours() != inputHours || resultTime.getMinutes() != inputMinutes || resultTime.getSeconds() != inputSeconds) { obj.value = ""; } else { obj.value = inputHours + ":" + inputMinutes + ":" + inputSeconds; } } </script>