TestBG

$(function() {
	var g = mw.config.get("wgUserGroups"),
		order = ["bureaucrat", "sysop", "rollback"],
		myGroups = mw.config.get("wgUserGroups"),
		dominantGroup;
	while (order.length > 0) {
		var currGroup = order.shift();
		if (myGroups.indexOf(currGroup) > -1) {
			dominantGroup = currGroup;
			break;
		}
	}
	if (typeof dominantGroup === "string") {
		var icons = {
			"bureaucrat": "http://static4.wikia.nocookie.net/the-unwanted/images/0/09/Bcrat_Star.png",
			"sysop": "http://static4.wikia.nocookie.net/the-unwanted/images/0/03/Admin_Star.png",
			"rollback": "http://static2.wikia.nocookie.net/the-unwanted/images/8/8f/Rollback_Star.png"
		};
		$("body").addClass("cugroup-" + dominantGroup);
		mw.util.addCSS(
			'body.cugroup-' + dominantGroup + ' #ChatHeader > .User > .username:after {\n' +
				'\tbackground-image: url(\'' + icons[dominantGroup] + '\');\n' +
				'\tbackground-position: 0 0;\n' +
			'}'
		);
	}
});