// start javascript code
function show_presence() {
	for (var i = 0; i < jabber_resources.length; ++i) {
		var resource = jabber_resources[i];
		if (resource.show === 'available') {
			document.getElementById('online').style.display = '';
			document.getElementById('offline').style.display = 'none';
		}
	}
}

function check_presence() {
	var attr = document.getElementById('online').getAttribute('jid');
	var jid  = attr.split('@');
	var url  = ['http://api.libraryh3lp.com/presence/jid', jid[0], jid[1], 'js'].join('/');
	document.write('<script type="text/javascript" src="' + url + '?cb=show_presence"></script>');
}

<!-- check_presence(); -->