17-5.html

js 全的样例代码,比较适合大家学习和交流

<script>
// This function recursively looks at node n and its descendants, 
// replacing all Text nodes with their uppercase equivalents.
function uppercase(n) {
    if (n.nodeType == 3 /*Node.TEXT_NODE*/) {
        // If the node is a Text node, create a new Text node that
        // holds the uppercase version of the node's text, and use the
        // replaceChild() method of the parent node to replace the
        // original node with the new uppercase node.
        var newNode = document.createTextNode(n.data.toUpperCase());
        var parent = n.parentNode;
        parent.replaceChild(newNode, n);
    }
    else {
        // If the node was not a Text node, loop through its children,
        // and recursively call this function on each child.
        var kids = n.childNodes;
        for(var i = 0; i < kids.length; i++) uppercase(kids[i]);
    }
}
</script>

<!-- Here is some sample text.  Note that the p tags have id attributes -->
<p id="p1">This <i>is</i> paragraph 1.</p>
<p id="p2">This <i>is</i> paragraph 2.</p>

<!-- Here is a button that invokes the uppercase() function defined above -->
<!-- Note the call to Document.getElementById() to find the desired node -->
<button onclick="uppercase(document.getElementById('p1'));">Click Me</button>