14
I have
index.php
<select id="year_list" name="year_list" onchange="check_year_event('year_list', 'event_list');" > . . . </select>
<select id="event_list" name="event_list" onchange="check_year_event('year_list', 'event_list');" > . . . </select>
.
.
.
<?php
function checkYearandEvent($year, $event) {
$year_event = mysql_query("SELECT * FROM year_event WHERE year = '$event' AND event = '$event'")
if (mysql_num_rows($year_event) > 0) {
// do this
}
}
?>
myscripts.js
function check_year_event(year_id, event_id) {
var year = document.getElementById(year_id).value;
var event = document.getElementById(event_id).value;
// call PHP function (but I don't know how): checkYearandEvent(year, event);
}
My question is how do I call the PHP function every time the user changes the value of any of the select element.