obj.currentStyle ? obj.currentStyle[attr] : getComputedStyle(obj)[attr]; =>currentStyle为IE var scroll = document.documentElement.scrollTop || document.body.scrollTop =>body为chrome
var ev = ev || event; event为IE和chrome,ev为标准
obj.attachEvent(‘onclick‘,fn); IE obj.addEventListener(‘click‘,fn,false);标准
obj.detachEvent(‘onclick‘,fn); IE obj.removeEventListener(‘click‘,fn,false) 标准
原文:http://www.cnblogs.com/joya0411/p/3567708.html