How can I validate a date field in Portal Forms

Question

I have a date field in portal forms that I want to perform validation on to make sure it's in the proper format before being accepted (mm/dd/yyyy). How can I validate against that field?

Answer 1

Hi Ben,
I took the time to test and revise. This is code that will validate a date entry (format MM/DD/YYYY). Just paste this in the "Before the start of the form..." window of the Additional PL/SQL code section of the form. Then add validateDate(); into the onBlur event window of the field in question. Replace the CYCLE_END_DATE with the field name in question.
HTP.P('
<SCRIPT LANGUAGE=javascript>
function validateDate() {
var ddObj;
var mmObj;
var yyObj;
var day;
var mon;
var year;
var field_val;
var field_name;
for (var j=0; j < document.forms[0].elements.length; j++) {
field_name = document.forms[0].elements[j].name;
field_val = document.forms[0].elements[j].value;
if (field_name.substring(field_name.indexOf(''DEFAULT.'') + 8, field_name.lastIndexOf(''.01'')) == ''CYCLE_END_DATE'') {
var delimPos = field_val.search(/\//i);
if (delimPos < 0)
alert(''Invalid date entry! Please enter in MM/DD/YYYY format. '' +
''e.g, Dec 21, 2003 would be entered as 12/21/2003'');
else
if (field_val.length != 10)
alert(''Invalid date entry! Please Please enter in MM/DD/YYYY format. '' +
''e.g, Jan 1, 2003 would be entered as 01/01/2003'');
else {
month = field_val.substring(0, field_val.indexOf(''/''));
day = field_val.substring(field_val.indexOf(''/'') + 1, field_val.lastIndexOf(''/''));
year = field_val.substring(field_val.lastIndexOf(''/'') + 1, 10);
/* Need to subtract 1 from value because in Javascript, January begins with 0
and ends with 11 for December */
month = month - 1;
ddObj = new Date(year, month, day);
mmObj = new Date(year, month, day);
yyObj = new Date(year, month, day);
if (ddObj.getDate(ddObj.setDate(day)) != day)
alert(''Invalid day!'');
if (mmObj.getMonth(mmObj.setMonth(month)) != month)
alert(''Invalid month!'');
if (mmObj.getYear(mmObj.setYear(year)) != year)
alert(''Invalid year!'');
</SCRIPT>
');