function getHTTPObject() {
	var xhr = false;
		if (window.XMLHttpRequest) {
		xhr = new XMLHttpRequest();
	} else if (window.ActiveXObject) {
		try {
			xhr = new ActiveXObject("Msxml2.XMLHTTP");
		} catch(e) {
			try {
			xhr = new ActiveXObject("Microsoft.XMLHTTP");
		} catch(e) {
			xhr = false;
		}
	}
}
	return xhr;
}


// CHANGE NAVIGATION
function grabNav(file) {
	var request = getHTTPObject();
	if (request) {
		displayLoading(document.getElementById("nav2nd"));
		request.onreadystatechange = function() {
			parseNavigation(request);
		};
		request.open("GET", file, true);
		request.send(null);
	}
}
function parseNavigation(request) {
	if (request.readyState == 4) {
		if (request.status == 200 || request.status == 304) {
			var details = document.getElementById("nav2nd");
			details.innerHTML = request.responseText;
		}
	}
}


// CHANGE CONTENT
function grabFile(file) {
	var request = getHTTPObject();
	if (request) {
		displayLoading(document.getElementById("content"));
		request.onreadystatechange = function() {
			parseResponse(request);
		};
		request.open("GET", file, true);
		request.send(null);
	}
}
function parseResponse(request) {
	if (request.readyState == 4) {
		if (request.status == 200 || request.status == 304) {
			var details = document.getElementById("content");
			details.innerHTML = request.responseText;
		}
	}
}
// SHARED
function displayLoading(element) {
	while (element.hasChildNodes()) {
		element.removeChild(element.lastChild);
	}
	var image = document.createElement("img");
	image.setAttribute("id","spinner");
	image.setAttribute("src","/media/img/hayes/greySpinner16px.gif");
	image.setAttribute("alt","Loading...");
	element.appendChild(image);
}


// GRAB TRACK or CHANGE TRACK
function grabTrack(file) {
	var details = document.getElementById("sample");
	var objectTag = "<object classid='clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B' codebase='http://www.apple.com/qtactivex/qtplugin.cab' type='video/quicktime' standby='Loading ...'><param name='src' value='"+file+"'><param name='controller' value='true'><embed controller='true' type='video/quicktime' src='"+file+"' pluginspage='http://www.apple.com/quicktime/download/'></embed></object>" 
	details.innerHTML = objectTag
}

// CHANGE IMAGE
function grabImg(file) {
	displayLoading(document.getElementById("fullScreen"));
	var details = document.getElementById("fullScreen");
	details.style.display="block";
	imageTag = "<a href='#' onclick='hideThis(); return false;'><img src='"+file+"' /></a>"
	details.innerHTML = imageTag
}
function hideThis() {
	var fullScreen = document.getElementById("fullScreen").style.display="none";
}