以下是針對(duì)移動(dòng)端html的默認(rèn)字體號(hào)數(shù)設(shè)置20px-40px，自適應(yīng)分辨率。
(function(doc,win){
var docEl = doc.documentElement,
resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize' ,
recalc = function(){
var clientWidth = docEl.clientWidth;
if(!clientWidth) return;
if(clientWidth>640){
clientWidth=640;
}
docEl.style.fontSize = 20 * (clientWidth / 320) + 'px';
};
if(!doc.addEventListener) return;
win.addEventListener(resizeEvt,recalc,false);
doc.addEventListener('DOMContentLoaded',recalc,false);
})(document,window);
