(function (doc, win) {
	var docEl = doc.documentElement,
		resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
		recalc = function () {
			// console.log("0000")
			var clientWidth = docEl.clientWidth;
			console.log("11111",clientWidth)
			if (!clientWidth) return;
			if (clientWidth >= 640) {
				docEl.style.fontSize = 60 + 'px'; 
			} else {
				docEl.style.fontSize = 100 * (clientWidth / 750) + 'px';
				// console.log("00001111")
			}

		};

	if (!doc.addEventListener) return;
	win.addEventListener(resizeEvt, recalc, false);

	doc.addEventListener('DOMContentLoaded', recalc, false);
	/*DOMContentLoaded文档加载完成不包含图片资源 onload包含图片资源*/
})(document, window);


/*

var iWidth=document.documentElement.clientWidth  //getBoundingClientRect().width;
 iWidth=iWidth>640?640:iWidth;
 document.getElementsByTagName("html")[0].style.fontSize=iWidth/6.4+"px";*/
