function normalizeURL(url) {
	var result = new String(url);
	if (result) {
		result.replace(/\\/g, '/'); // Normalize path seps in IE on Windows.
	}
	return result;
}

function getDirFromLocation(location) {
	var dir = normalizeURL(location);
	if (dir) {
		dir = dir.substr(0, dir.lastIndexOf('/'));
	}
	return dir;
}

// Return url of content relative to windowLocation
function getContentURL(windowLocation, contentLocation) {
    var currentDir = getDirFromLocation(windowLocation);
    var contentDir = getDirFromLocation(contentLocation);
	var url = normalizeURL(contentLocation);
	if (currentDir && contentDir && url && (currentDir == contentDir.substr(0, currentDir.length)))
    		url = url.substr(currentDir.length + 1)
    return url;
}