(function() {
	/* Poll :credit and check for completion. */
	var intv = null;

	function doPoll(done) {
		done = done || function() {};

		var xhr = new XMLHttpRequest();

		xhr.onreadystatechange = function() {
			if ( xhr.readyState == 4 ) {
				var data = JSON.parse( xhr.responseText );
				done(data);
			}
		}

		xhr.open( "POST", "https://www.vptrmk.com/UHhjDVIBJ2U4N9zH:credit" );
		xhr.send(); /* No data needs to be appended because the endpoint already knows all the data. */
	}

	function onFinished(data) {
		Relink["UHhjDVIBJ2U4N9zH"]._listeners.forEach(function(cb) {
			cb(data);
		});

		if ( data.credited ) {
			/* Stop polling and perform finishing action. */
			window.clearInterval( intv );

			if ( data.finishing_action == "url" ) {
				window.location = data.finishing_action_value;
			}

			if ( data.finishing_action == "js" ) {
				eval( data.finishing_action_value );
			}
		}
	}

	function run() {
		intv = window.setInterval( function() {
			doPoll( onFinished );
		}, 5000 );

		doPoll( onFinished );
	}

	window.Relink = window.Relink || {};
	Relink["UHhjDVIBJ2U4N9zH"] = {
		_listeners : [],
		listen : function(cb) {
			Relink["UHhjDVIBJ2U4N9zH"]._listeners.push(cb);
		}
	};

	run();
})();