Form Issue

Hello,

I apologise, but I do not know Javascript, and so am uncertain how to incorporate the underneath into a form.

I have a lot of Presenters from all around the world, and need them to indicate to me what timezone they reside in.

I found a little bit of javascript code that neatly creates an array of timezones. This can then create an input box in the obvious way. My presenters can then select the one applicable to them.

However, I am uncertain how to send the value they have selected across to the update query, when they push the "Update" button.

I am sure that, as ever, it is quite elementary.
Thank you for your kindness.

Here is the coding I have thus far

<form name="mytimezoner" method="post" action="">

<?php
$regions = array(
'America' => DateTimeZone::AMERICA,
'Pacific' => DateTimeZone::PACIFIC,
'Europe' => DateTimeZone::EUROPE,
'Australia' => DateTimeZone::AUSTRALIA,
'Asia' => DateTimeZone::ASIA,
'Indian' => DateTimeZone::INDIAN,
'Africa' => DateTimeZone::AFRICA,
'Atlantic' => DateTimeZone::ATLANTIC,
'Antarctica' => DateTimeZone::ANTARCTICA
);

$timezones = array();
foreach ($regions as $name => $mask)
{
$zones = DateTimeZone::listIdentifiers($mask);
foreach($zones as $timezone)
{
// Get current time
$time = new DateTime(NULL, new DateTimeZone($timezone));

// Change from military time
$ampm = $time->format('H') > 12 ? ' ('. $time->format('g:i a'). ')' : '';

// Remove region name and add a sample time
$timezones[$name][$timezone] = substr($timezone, strlen($name) + 1) . ' - ' . $time->format('H:i') . $ampm;
}
}


// Create Viewable Selections


print '<label>Select Your Timezone</label><select name = "timezone" id="timezone">';
foreach($timezones as $region => $list)
{
print '<optgroup label="' . $region . '">' . "\n";
foreach($list as $timezone => $name)
{
// print '<option name="' . $timezone . '">' . $name . '</option>' . "\n";
print '<option value="' . $timezone . '">' . $name . '</option>' . "\n";
}
print '<optgroup>' . "\n";
}
print '</select>';
?>

<input type="submit" name="Update" class="button fit primary" value="Press to Save and Update">
</form>

I am simply uncertain what to put in the fields DataAssist kindly provides for me as a part of its convenient Update query.

Thank you.