// javascript document
adaptive(document, window);//初始加载自适应
function adaptive(doc, win) {

	var docel = doc.documentelement,
	resizeevt = 'orientationchange' in window ? 'orientationchange' : 'resize',
	recalc = function() {
		var clientwidth = docel.clientwidth;
	//	console.log(clientwidth)
		if(!clientwidth) return;
		if(clientwidth > 750) {
		docel.style.fontsize = 100 * (clientwidth / 1920) + 'px';
		}else  {
			docel.style.fontsize = 100 * (clientwidth / 750) + 'px';
			// console.log(750)
		}
	};
	if(!doc.addeventlistener) return;
	        win.addeventlistener(resizeevt, recalc, false);
		doc.addeventlistener('domcontentloaded', recalc, false);
	}
	//随浏览器大小自适应
	window.onresize = function() {
	adaptive(document, window);
}