[jQuery] [jquery.form] How to structure url parameter ?

[jQuery] [jquery.form] How to structure url parameter ?


jquery.form.js v2.18
How to structure the url parameter in order to use a function
localized in a php file ?
include ('myPHP_file.php');
$('#form1').ajaxSubmit(
{target:'#output',
type: 'post',
url:'myFunction',
success: showResponse
});
myPHP_file.php:
<?
function myFunction()
{
...
}
?>
This gives an 404 error