Dynamically creating XML files from PHP

[fee]

I want to change items of Select2 on change event of Select1.Select1's On Change event runs PHP script:

$result = mysql_query('SELECT id, name FROM mytable');print ('<?xml version="1.0" encoding="ISO-8859-1"?>');print ('<list>');while ($row = mysql_fetch_array($result)) {    print ('<listitem>');    print ('<id>' . $row['id'] . '</id>');    print ('<text>' . $row['name'] . '</text>');    print ('</listitem>');	    }	print ('</list>');

I'm loading as it stays on w3schools (for Firefox):

var xmlFileUrlxmlFileUrl = 'script/generate-xml.php'//xmlFileUrl = 'localhost/test.xml'xmlDoc = document.implementation.createDocument("","",null)xmlDoc.load(xmlFileUrl)xmlDoc.onload=getmessage

And getmessage function is:

alert(xmlDoc.documentElement.nodeName)

It works fine when XML file is loaded from localhost, but when I try to get it from the gerator script I get this error message: Error: xmlDoc.documentElement has no propertiesIt looks like generated XML file is not even loaded into xmlDoc. Why is taht (it all works for IE both ways)? What should I do?