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function addJS(url) {
	var script = document.createElement('script');
	script.setAttribute('type', 'text/javascript');
	script.setAttribute('src', url);
	document.getElementsByTagName('head')[0].appendChild(script);
}
function addCSS(url) {
	var cssLink = document.createElement('link');
	cssLink.setAttribute('rel', 'stylesheet');
	cssLink.setAttribute('type', 'text/css');
	cssLink.setAttribute('href', url);
	document.getElementsByTagName('head')[0].appendChild(cssLink);
}