//domchanger.js for xdocument.xml
var xmlRequest= new XMLHttpRequest();
function changeDom()
{
	var selection = document.getElementById('toggleBooks').value;
	alert(selection);
	if(selection == "bar")
	{
		alert("in bar");
		xmlRequest.open("GET", "http://localhost/nstechseries/demos/xmlhttprequest/bar.xml");
	}
	else if(selection == "foo")
	{
		alert("in foo");
		xmlRequest.open("GET", "http://localhost/nstechseries/demos/xmlhttprequest/foo.xml");
	}
	xmlRequest.onload=changeDomNodes;
	xmlRequest.send(null);
}
function changeDomNodes()
{
	var newXML = xmlRequest.responseXML;
	if (newXML.documentElement)
	{
		docFrag = document.createDocumentFragment();
		docFrag = newXML;
		var myMetaDoc = document.getElementsByTagName('MetaSet').item(0);
		var children = myMetaDoc.childNodes;
		alert('MetaSet has ' + children.length + ' children');
		//removeChildren(myMetaDoc);
		alert(myMetaDoc.firstChild.item(0).data);
		alert(myMetaDoc.lastChild.data);
		myMetaDoc.replaceChild(docFrag.childNodes.item(0), myMetaDoc.childNodes.item(0));
		//myMetaDoc.removeChild(myMetaDoc.childNodes.item(0));
		myMetaDoc.removeChild(myMetaDoc.childNodes.item(1));
		myMetaDoc.removeChild(myMetaDoc.childNodes.item(2));
		//myMetaDoc.appendChild(docFrag.childNodes.item(0));
	}
	else
		alert("Uh-oh, something went wrong!");
}	
function removeChildren(subtree)
{
	var children = subtree.childNodes;
	for(i = 0; i < children.length; i++)
	{
		child = children.item(i);//
		if(child.hasChildNodes())
		{
			removeChildren(child)
		}
		else
		subtree.removeChild(child);	
	}
}