Full version: jsB@nk » Time » Validation » Validate Date script
URL: https://www.javascriptbank.com/validate-date-script.html
This is a simple date validation. The script is written for the European format (ddmmyy), but can easily be changed.
Full version: jsB@nk » Time » Validation » Validate Date script
URL: https://www.javascriptbank.com/validate-date-script.html
<SCRIPT LANGUAGE="JavaScript">// Torsten Frey (tf@tfrey.de) , http://www.tfrey.de/<!-- Beginfunction check_date(field){var checkstr = "0123456789";var DateField = field;var Datevalue = "";var DateTemp = "";var seperator = ".";var day;var month;var year;var leap = 0;var err = 0;var i; err = 0; DateValue = DateField.value; /* Delete all chars except 0..9 */ for (i = 0; i < DateValue.length; i++) { if (checkstr.indexOf(DateValue.substr(i,1)) >= 0) { DateTemp = DateTemp + DateValue.substr(i,1); } } DateValue = DateTemp; /* Always change date to 8 digits - string*/ /* if year is entered as 2-digit / always assume 20xx */ if (DateValue.length == 6) { DateValue = DateValue.substr(0,4) + '20' + DateValue.substr(4,2); } if (DateValue.length != 8) { err = 19;} /* year is wrong if year = 0000 */ year = DateValue.substr(4,4); if (year == 0) { err = 20; } /* Validation of month*/ month = DateValue.substr(2,2); if ((month < 1) || (month > 12)) { err = 21; } /* Validation of day*/ day = DateValue.substr(0,2); if (day < 1) { err = 22; } /* Validation leap-year / february / day */ if ((year % 4 == 0) || (year % 100 == 0) || (year % 400 == 0)) { leap = 1; } if ((month == 2) && (leap == 1) && (day > 29)) { err = 23; } if ((month == 2) && (leap != 1) && (day > 28)) { err = 24; } /* Validation of other months */ if ((day > 31) && ((month == "01") || (month == "03") || (month == "05") || (month == "07") || (month == "08") || (month == "10") || (month == "12"))) { err = 25; } if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") || (month == "11"))) { err = 26; } /* if 00 ist entered, no error, deleting the entry */ if ((day == 0) && (month == 0) && (year == 00)) { err = 0; day = ""; month = ""; year = ""; seperator = ""; } /* if no error, write the completed date to Input-Field (e.g. 13.12.2001) */ if (err == 0) { DateField.value = day + seperator + month + seperator + year; } /* Error-message if err != 0 */ else { alert("Date is incorrect!"); DateField.select(); DateField.focus(); }}// End --></script><!-- This script downloaded from www.JavaScriptBank.com Come to view and download over 2000+ free javascript at www.JavaScriptBank.com--><FORM name="datecheck"><TABLE border="0" width="60%"> <TR> <TD> Enter Date (Use European format shown at right)<P> <INPUT type="text" name=testdat size='10' maxlength="10" onblur="check_date(this)"> <INPUT type= "submit" name="button" value="Press to Validate"><p>(Date is validated after leaving the field.) </TD> <TD> <b>ddmmyy</b> (171201) or <BR> <b>ddmmyyyy</b> (17122001) or <BR> <b>ddXmmXyy</b> (17-12-01 or 17y12q01 ... ) or <BR> <b>ddXmmXyyyy</b> (17.12.2001 or 17,12,2001 ...) <br> where "X" is any sign not in 0..9, i.e. "-" or "/"<p> </TD> </TR></TABLE></FORM><!-- This script downloaded from www.JavaScriptBank.com Come to view and download over 2000+ free javascript at www.JavaScriptBank.com-->