(function(doc, win) {
	var docEl = doc.documentElement, resizeEvt = 'onorientationchange' in window ? 'onorientationchange' : 'resize', recalc =
		function() {
			var clientWidth = docEl.clientWidth;
			//  if (!clientWidth) return;
			//  if(clientWidth>=750){
			//  	docEl.style.fontSize = '100px';
			//  }else{
			//  }
			docEl.style.fontSize = 100 * (clientWidth / 750) + 'px';
		};

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