Warum E4X?

var xmlDoc
//code for Internet Explorer
if (window.ActiveXObject)
{
xmlDoc = new ActiveXObject("Microsoft.XMLDOM")
xmlDoc.async=false;
xmlDoc.load("note.xml")
displaymessage()
}
// code for Mozilla, Firefox, etc.
else (document.implementation && document.implementation.createDocument)
{
xmlDoc= document.implementation.createDocument("","",null)
xmlDoc.load("note.xml");
xmlDoc.onload=displaymessage
}

function displaymessage()
{
document.write(xmlDoc.getElementsByTagName("body")[0].firstChild.nodeValue)
}

var xmlDoc=new XML()
xmlDoc.load("note.xml")
document.write(xmlDoc.body)