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  #1 (permalink)  
Old February 4th, 2005, 06:40 AM
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Default date validation (again)

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

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Old February 4th, 2005, 06:43 AM
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Default

How are you calling the check_date() function?

Cheers,

Chris

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Old February 4th, 2005, 06:45 AM
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Default

My textbox calls it:

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

Should this work?


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Old February 4th, 2005, 06:58 AM
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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


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Old February 4th, 2005, 07:02 AM
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Default

where would i add this true/false statement?

thanks

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Old February 4th, 2005, 07:09 AM
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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;
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Old February 4th, 2005, 07:12 AM
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Default

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


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Old February 4th, 2005, 07:33 AM
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Don't know.

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

Cheers,

Chris

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Old February 4th, 2005, 07:56 AM
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cheers. went through 20-odd questions.....

and you have to BUY the font!!



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Old February 4th, 2005, 08:27 AM
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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 :)

--

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