動態加載css

// 動態加載css
		var loadStyle = function(url) {
			var link = document.createElement('link');
			link.rel = "stylesheet";
			link.type = "text/css";
			link.href = url;
			var head = document.getElementsByTagName("head")[0];




			head.appendChild(link);




		};
		// css加載
		loadStyle('./stylesheets/main.css');