;(function(designWidth, maxWidth) {

	var doc = document,

		win = window;

	var docEl = doc.documentElement;

	var tid;

	var rootItem,rootStyle;



	function refreshRem() {

		var width = docEl.getBoundingClientRect().width;

		if (!maxWidth) {

			maxWidth = 540;

		};

		if (width > maxWidth) {

			width = maxWidth;

		}

		var rem = width * 100 / designWidth;

		rootStyle="html{font-size:"+rem+'px !important}';

		rootItem = document.getElementById('rootsize') || document.createElement("style");

		if(!document.getElementById('rootsize')){

		document.getElementsByTagName("head")[0].appendChild(rootItem);

		rootItem.id='rootsize';

		}

		if(rootItem.styleSheet){

		rootItem.styleSheet.disabled||(rootItem.styleSheet.cssText=rootStyle)

		}else{

		try{rootItem.innerHTML=rootStyle}catch(f){rootItem.innerText=rootStyle}

		}

		docEl.style.fontSize = rem + "px";

	};

	refreshRem();



	win.addEventListener("resize", function() {

		clearTimeout(tid); 

		tid = setTimeout(refreshRem, 300);

	}, false);



	win.addEventListener("pageshow", function(e) {

		if (e.persisted) { 

			clearTimeout(tid);

			tid = setTimeout(refreshRem, 300);

		}

	}, false);



	if (doc.readyState === "complete") {

		doc.body.style.fontSize = "16px";

	} else {

		doc.addEventListener("DOMContentLoaded", function(e) {

			doc.body.style.fontSize = "16px";

		}, false);

	}

})(375, 3750);