How do I make my HTML form active?

[Steeevoe]

I am struggling to get a date of birth selection working.

I have three fields, day, month and year.
Day and Month are select fields.


I would like the day field to change according to the month selected with the page refreshing. So I would like 30 days available when month is April, June, July, Sept and Nov, 31 days for the other months apart from February with 28 (apart from leap year)

I have tried google but I can't find a lead to how I am supposed to sovle this.

Please help!



(note I am using php method to submit form when finished)

[garrettroyce]

this drop down box might be easier:

http://www.nsftools.com/tips/DatePickerTest.htm

[freecrm]

Firstly, set a variable according to month chosen using a series of if, thens.

<?php
$daysinmonth=31;//set default
if ($_POST['month'] =="Jan"){
$daysinmonth=31;
} else if ($_POST['month'] == "Feb"){
$daysinmonth=28;
}

etc... etc... for each month

Then you need your select field for the dates..

<select name="selectdate" id="selectdate">
       <?php
    for ($i = 1; $i <= $daysinmonth; $i++)//starting at 1 and looping until daysinmonth is reached - then incrementing by 1
    {
    echo '<option value="'. $i . '" ';// value
    echo  ">" . $i . "</option>";// viewed
    }
    ?>
      </select>

Haven't tested this so the sytax might be a bit off, but the principle is OK.

______________

The trouble with this is that you have to refresh - some use AJAX, which could achive this without refreshing, but I don't know enough to help on this.

Alternatively, as posted above, you could just rip one thats already done!

[garrettroyce]

That will work too, the only problem is leap years

[mattura]

Look up javascript.
It's not that difficult to learn if you know php and will be able to dynamically change the fields.
Just give everything an id parameter (<input id='box1' />) and refer to the element by document.getElementById(theID) and use innerHTML
eg

<select id='datebox'></select>
<script>
document.getElementById('datebox').innerHTML="<option>1st</option><option>2nd</option>";
</script>

[xav0989]

Or you could let the user submit any date, and check on server-side...

[gomarc]

Assuming the user gives you the year and the month, you can also get the number of days like this:

<?php

//Number of days for the given month and year

$month = "2";
$year  = "2008";

$days = date("t", mktime(0, 0, 0, $month, 1, $year));

// Prints: The year/month 2008/2 has 29 days!
echo "The year/month  " . $year . "/" . $month . " has " . $days . " days!";

?>

... and then build your options up to that number of days.

[freecrm]

Nice - good contribution!

[Steeevoe]

Thank you guys. Much apprecited. Just got to find the time to do it. We happen to be decorating at the mo ^^