javascript 學習筆記

dom程式設計:

Element.insertBefore(newChild,refChild)

<div id="dv"><span id="sp"></span></div>      

var dv=document.getElementById("dv");
var sp=document.getElementById("sp");
var dv1=document.createElement("div");
dv.insertBefore(dv1,sp);      

var sp = document.getElementById("sp");
    var dv1 = document.createElement("div");
    sp.parentNode.insertBefore(dv1, sp);