gistfile1.js

var room = 37671;
 $J.post(
	'http://steamcommunity.com/minigame/ajaxleavegame/',
	{ 'gameid' : '43089', 'sessionid' : g_sessionID }
);
var trying = false;
function tryJoin() {
	if (!trying) {
		trying = true;
		JoinGameHelper(room);
		return;
	} else {
		var button = $J('.btn_grey_white_innerfade');
		if (button) {
			button.click();
			trying = false;
		}
	}
};
window.setInterval(tryJoin, 1000);