树状导航菜单的实现

Question

有关树的东东以前问过很多
我这里有一个，你的email？

Answer 1

我也要一份
[email protected]

Answer 2

<SCRIPT language=JavaScript1.2>
scores = new Array(20);
var numTotal=0;
NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
ver4 = (NS4 || IE4) ? 1 : 0;if (ver4) {
    with (document) {
        write("<STYLE TYPE='text/css'>");
        if (NS4) {
            write(".parent {position:absolute; visibility:visible}");
            write(".child {position:absolute; visibility:visible}");
            write(".regular {position:absolute; visibility:visible}")
        }
        else {
            write(".child {display:none}")
        }
        write("</STYLE>");
    }
}function getIndex(el) {
    ind = null;
    for (i=0; i<document.layers.length; i++) {
        whichEl = document.layers[i];
        if (whichEl.id == el) {
            ind = i;
            break;
        }
    }
    return ind;
}function arrange() {
    nextY = document.layers[firstInd].pageY +document.layers[firstInd].document.height;
    for (i=firstInd+1; i<document.layers.length; i++) {
        whichEl = document.layers[i];
        if (whichEl.visibility != "hide") {
            whichEl.pageY = nextY;
            nextY += whichEl.document.height;
        }
    }
}function initIt(){
    if (!ver4) return;
    if (NS4) {
        for (i=0; i<document.layers.length; i++) {
            whichEl = document.layers[i];
            if (whichEl.id.indexOf("Child") != -1) whichEl.visibility = "hide";
       }
        arrange();
    }
    else {
        divColl = document.all.tags("DIV");
        for (i=0; i<divColl.length; i++) {
            whichEl = divColl(i);
            if (whichEl.className == "child") whichEl.style.display = "none";
        }
    }
}function expandIt(el) {
if (!ver4) return;
    if (IE4) {
        whichEl1 = eval(el + "Child");
for(i=1;i<=numTotal;i++){
whichEl = eval(scores[i] + "Child");
if(whichEl!=whichEl1) {
whichEl.style.display = "none";
}
}
        whichEl1 = eval(el + "Child");
        if (whichEl1.style.display == "none") {
            whichEl1.style.display = "block";
        }
        else {
            whichEl1.style.display = "none";
        }
    }
    else {
        whichEl = eval("document." + el + "Child");
for(i=1;i<=numTotal;i++){
whichEl = eval("document." + scores[i] + "Child");
if(whichEl!=whichEl1) {
whichEl.visibility = "hide";
}
}
        if (whichEl.visibility == "hide") {
            whichEl.visibility = "show";
        }
        else {
            whichEl.visibility = "hide";
        }
        arrange();
    }
}
onload = initIt;
</SCRIPT>这个可以吗？效果你可以去http://www.51javascript.net/free/Page-Details/search10.htm#看看：）

Answer 3

http://www.csdn.net/Expert/forum.asp?typenum=8&searchKeys=%CA%F7&roomid=27&author=&tabletype=now看看，都被问烂了