1 function getStyle(obj, attr){ 2 if(obj.currentStyle){ 3 style = obj.currentStyle[attr]; //兼容IE8以下 4 }else{ 5 style = getComputedStyle(obj,false)[attr]; 6 }; 7 return style; 8 } 9 10 var ele = document.querySelector(‘body‘); 11 getStyle(ele,‘width‘)
原文：http://www.cnblogs.com/iloveyou-sky/p/6261475.html