javascript Dom编程艺术

<ul id="navigation">
    <li><a href="猿团教育" accesskey="1">Home</a></li>
    <li><a href="search.html" accesskey="4">search</a></li>
    <li><a href="contact.html" accesskey="9">contact</a></li>
</ul>

function displayAccesskeys(){
    if(!document.getElementsByTagName || !document.createElement || !document.createTextNode)  return false;
    var ul = document.getElementById("navigation");
    var links = ul.getElementsByTagName("a");
    var akeys = new Array();
    for(var i=0;i<links.length;i++){
        if(!links[i].getAttribute("accesskey")) continue;
        var key = links[i].getAttribute("accesskey");
        var text = links[i].lastChild.nodeValue;
        akeys[key] = text;
    }
    var list = document.createElement("ul");
    for(key in akeys){
        var text = akeys[key];
        var str = key + " : " + text;
        var item = document.createElement("li");
        var item_text = document.createTextNode(str);
        item.appendChild(item_text);
        list.appendChild(item);
    }
    var header = document.createElement("h3");
    var header_text = document.createTextNode("Accesskeys");
    header.appendChild(header_text);
    document.body.appendChild(header);
    document.body.appendChild(list);
}