请教ＤＯＭ一个小问题
<script>
function embolden(node){
var bold=document.createElement( "b ");
var parent=node.parentNode;
parent.replaceChild(bold,node);
bold.appendChild(node);
}
</script>


<p id= "p1 "> this <i> is </i> paragraph #1. </p>
<p id= "p2 "> this <i> is </i> paragraph #2. </p>
<button onclick= "embolden(document.getElementById( 'p1 ')); "> embolden </button>


按照上面的事件处理程序来说．并不是只将＜Ｐ＞和＜／Ｐ＞这两个标记替换成＜Ｂ＞和＜／Ｂ＞，而是将 <p id= "p1 "> this <i> is </i> paragraph #1. </p> 替换成＜Ｂ＞和＜／Ｂ＞．我想问下document.getElementById( 'p1 ')得到的元素只是＜Ｐ＞和＜／Ｐ＞还是包含this <i> is </i> paragraph #1．？谢谢

[解决办法]
包含this <i> is </i> paragraph #1．
[解决办法]
alert(node.innerHTML);

将显示: this <i> is </i> paragraph #1.