Flux.Core.addStyleSheet = function(styleSheet) {
	var style = document.createElement('style');
	style.setAttribute('type', 'text/css');
	document.getElementsByTagName('head')[0].appendChild(style);

	if (Sys.Browser.agent == Sys.Browser.InternetExplorer) {
			var el = document.createElement('div');
			var body = document.getElementsByTagName('body')[0];
			body.insertBefore(el, body.firstChild);
			el.style.display = 'none';
			el.innerHTML = String.format('<br><style>{0}</style>', styleSheet);
	} else {
		style.textContent = styleSheet;
	}
}