jq auto.js

!new function(){var e=this;e.width=640;e.fontSize=100;e.widthProportion=function(){var t=(document.body&&document.body.clientWidth||document.getElementsByTagName("html")[0].offsetWidth)/e.width;return t>1?1:t;};e.changePage=function(){//alert(e.widthProportion());document.getElementsByTagName("html")[0].setAttribute("style","font-size:"+e.widthProportion()*e.fontSize+"px !important")};e.changePage();window.addEventListener("resize",function(){e.changePage()},!1)};

直接引用即可