js中,setAttribute是给对象赋属性的方法,具体用法可以参考3C上面对javascript各种属性的讲解和用法
var dc=document.getElementsByClassName("default-container")for(var i=0i<dc.lengthi++){
dc[i].innerHTML=dc[i].innerHTML.replace("读音:"," 读音:<span class='fatyam'>").replace("<br>词性:","</span><br>词性:")
}