17-6.html

js 全的样例代码,比较适合大家学习和交流

<script>
// This function takes a node n, replaces it in the tree with an Element node
// that represents an html <b> tag, and then makes the original node the
// child of the new <b> element.
function embolden(node) {
    var bold = document.createElement("b"); // Create a new <b> Element
    var parent = node.parentNode;           // Get the parent of node
    parent.replaceChild(bold, node);        // Replace node with the <b> tag
    bold.appendChild(node);                 // Make node a child of the <b> tag
}
</SCRIPT>

<!-- A couple of sample paragraphs -->
<p id="p1">This <i>is</i> paragraph #1.</p>
<p id="p2">This <i>is</i> paragraph #2.</p>

<!-- A button that invokes the embolden() function on the first paragraph -->
<button onclick="embolden(document.getElementById('p1'));">Embolden</button>