如何增加HTML元素

Question

<div id="root">
<div id="a">a</div>
<div id="b">b</div>
<div id="c">c</div>
</div>
<script language=javascript>
document.getElementById("root").appendChild(document.getElementById("b"))
</script>

Answer 1

<div id="root">
<div id="a">a</div>
<div id="b">b</div>
<div id="c">c</div>
</div>
<SCRIPT LANGUAGE="JavaScript">
<!--
var d = document.createElement("DIV");
d.id = "d";
d.innerHTML = "ddd";
document.getElementById("a").appendChild(d);
//-->
</SCRIPT>