//按wrap宽度设置文字大小
(function (doc, win) {
  var docEl = doc.documentElement,
    resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
    recalc = function () {
      var clientWidth = docEl.clientWidth;
	  	var tempWidth=document.getElementById("wrap").clientWidth;
	  	
	  	
	      if (!clientWidth) return;
	      docEl.style.fontSize = (tempWidth / 19) + 'px';
	   };
  if (!doc.addEventListener) return;
  
  win.addEventListener(resizeEvt, recalc, false);
  doc.addEventListener('DOMContentLoaded', recalc, false);
  recalc();
})(document, window);