sailun-shop/script/rem.js

(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 = 20 * (clientWidth / 320) + 'px';
	};
	if (!doc.addEventListener)
		return;
	win.addEventListener(resizeEvt, recalc, false);
	doc.addEventListener('DOMContentLoaded', recalc, false);
})(document, window);