Permisi gan ... Ane mau nanya nih, nyoba parsing xml pake javascript tapi gagal terus ... Hasil googling sih, takutnya ada yang salah

ini xml-nya

<?xml version="1.0" encoding="ISO-8859-1"?>



<All>



<task>

<question>Where is Paris?</question>

<option>France</option>

<option>Belgium</option>

<option>Norway</option>

</task>



<task>

<question>Where is London?</question>

<option>England</option>

<option>China</option>

<option>Denmark</option>

</task>





<task>

<question>Where is Rome?</question>

<option>Italy</option>

<option>Brazil</option>

<option>Canada</option>

</task>



</All>

Ini javascriptnya gan

var Questions = new Array;

 var Options = new Array;

 

 function loadXML(file) {

 var xhttp = new XMLHttpRequest();

 xhttp.open("GET", file, false);

 xhttp.send();

 return xhttp.responseXML;

 }

 var xmlDoc = loadXML('data1.xml');

 task = xmlDoc.getElementsByTagName('All');

 for(i = 0; i < task.length; i++) { 

 alert(task[i].childNodes[0].childNodes[0].nodeValue);

 alert(task[i].childNodes[0].childNodes[0].nodeValue);

 alert(task[i].childNodes[0].childNodes[0].nodeValue);

 alert(task[i].childNodes[0].childNodes[0].nodeValue);

 } 

Mohon pencerahannya gan