部分js代码

<script>
	(function (doc, win) {
		var docEl = doc.documentElement,
				resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
				recalc = function () {
					var clientWidth = docEl.clientWidth;
					if (!clientWidth) return;
					docEl.style.fontSize = 5 * (clientWidth / 100) + 'px';
				};

		if (!doc.addEventListener) return;
		win.addEventListener(resizeEvt, recalc, false);
		doc.addEventListener('DOMContentLoaded', recalc, false);
	})(document, window);
</script>