date validation (again)

crmpicco · February 4th, 2005, 06:40 AM

How do i stop someone entering a duff value then just hitting the 'enter' key to submit the form?

there is javascript, to ensure you enter in the correct format. but only if you tab to the button or click it.

function 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("Incorrect Date: Please Enter the Date in Format 'DD/MM/YY'");
      DateField.select();
      DateField.focus();
   }
}

thats my existing javascript.

any ideas?

Picco

ChrisScott · February 4th, 2005, 06:43 AM

How are you calling the check_date() function?

Cheers,

Chris

crmpicco · February 4th, 2005, 06:45 AM

My textbox calls it:

<input type="text" size="10" name="date" value="" onblur="check_date(this)">

Should this work?

ChrisScott · February 4th, 2005, 06:58 AM

You can perform validation when the form is submitted using the forms onsubmit event...

Code:

<form name="myFormName" onsubmit="return check_date(this.date);">

You will also need to update your function to return true / false depending on whether or not the field passes validation to prevent the form submitting.

HTH,

Chris

crmpicco · February 4th, 2005, 07:02 AM

where would i add this true/false statement?

thanks

ChrisScott · February 4th, 2005, 07:09 AM

By the look of your function you are setting an error code & if this code is 0, everything is ok.
So at the end of your function add...

Code:

return err == 0 ? true : false;

crmpicco · February 4th, 2005, 07:12 AM

chris,

--------------------------------------------------------------------------------

http://www.donaldmackenzie.com/

Does anyone know of a font face (or name) like the text 'Welcome to Mackenzie Travel' at the top of this page pasted above?

Thanks.

Picco

ChrisScott · February 4th, 2005, 07:33 AM

Don't know.

This link may help you narrow it down: http://www.fonts.com/findfonts/ident...AME=identifont

Cheers,

Chris

crmpicco · February 4th, 2005, 07:56 AM

cheers. went through 20-odd questions.....

and you have to BUY the font!!

www.crmpicco.co.uk

joefawcett · February 4th, 2005, 08:27 AM

Quote:

quote:Originally posted by crmpicco
cheers. went through 20-odd questions.....

and you have to BUY the font!!

www.crmpicco.co.uk

Amazing, someone wants paying for all the work they've done :)

--

Joe (Microsoft MVP - XML)