如何自动展开treeview第一级

[childbaby]

d = new dTree('d');

d.config.closeSameLevel=false;
d.config.useCookies=false;
d.icon.root = "../images/tree/empty.gif";
d.add(0,-1,'','');
d.add(1,0,'sample','#');

document.write(d);

[childbaby]

/*--------------------------------------------------|
| dTree 2.05 | www.destroydrop.com/javascript/tree/ |
|---------------------------------------------------|
| Copyright (c) 2002-2003 Geir Landr? |
| |
| This script can be used freely as long as all |
| copyright messages are intact. |
| |
| Updated: 17.04.2003 |
|--------------------------------------------------*/

// Node object
function Node(id, pid, name, url, title, target, icon, chec , iconOpen, open) {
this.id = id;
this.pid = pid;
this.name = name;
this.url = url;
this.title = title;
this.target = target;
this.icon = icon;
this.chec = chec;
this.iconOpen = iconOpen;
this._io = open || false;
this._is = false;
this._ls = false;
this._hc = false;
this._ai = 0;
this._p;
};

// Tree object
function dTree(objName) {
this.config = {
target : null,
folderLinks : true,
useSelection : true,
useCookies : true,
useLines : true,
useIcons : true,
useStatusText : false,
closeSameLevel : false,
inOrder : false,
repeat : false//是否复选
}
this.icon = {
root : '../images/tree/base.gif',
folder : '../images/tree/folder.gif',
folderOpen : '../images/tree/folderopen.gif',
node : '../images/tree/page.gif',
empty : '../images/tree/empty.gif',
line : '../images/tree/line.gif',
join : '../images/tree/join.gif',
joinBottom : '../images/tree/joinbottom.gif',
plus : '../images/tree/plus.gif',
plusBottom : '../images/tree/plusbottom.gif',
minus : '../images/tree/minus.gif',
minusBottom : '../images/tree/minusbottom.gif',
nlPlus : '../images/tree/nolines_plus.gif',
nlMinus : '../images/tree/nolines_minus.gif'
};
this.obj = objName;
this.aNodes = [];
this.aIndent = [];
this.root = new Node(-1);
this.selectedNode = null;
this.selectedFound = false;
this.completed = false;

};

// Adds a new node to the node array
dTree.prototype.add = function(id, pid, name, url, title, target, icon, chec , iconOpen, open) {
this.aNodes[this.aNodes.length] = new Node(id, pid, name, url, title, target, icon, chec , iconOpen, open);
};

// Open/close all nodes
dTree.prototype.openAll = function() {
this.oAll(true);
};
dTree.prototype.closeAll = function() {
this.oAll(false);
};

// Outputs the tree to the page
dTree.prototype.toString = function() {
var str = '<div class="dtree">\n';
if (document.getElementById) {
if (this.config.useCookies) this.selectedNode = this.getSelected();
str += this.addNode(this.root);
} else str += 'Browser not supported.';
str += '</div>';
if (!this.selectedFound) this.selectedNode = null;
this.completed = true;
return str;
};

[childbaby]

// Creates the tree structure
dTree.prototype.addNode = function(pNode) {
var str = '';
var n=0;
if (this.config.inOrder) n = pNode._ai;
for (n; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == pNode.id) {
var cn = this.aNodes[n];
cn._p = pNode;
cn._ai = n;
this.setCS(cn);
if (!cn.target && this.config.target) cn.target = this.config.target;
if (cn._hc && !cn._io && this.config.useCookies) cn._io = this.isOpen(cn.id);
if (!this.config.folderLinks && cn._hc) cn.url = null;
if (this.config.useSelection && cn.id == this.selectedNode && !this.selectedFound) {
cn._is = true;
this.selectedNode = n;
this.selectedFound = true;
}
str += this.node(cn, n);
if (cn._ls) break;
}
}
return str;
};

// Creates the node icon, url and text
dTree.prototype.node = function(node, nodeId) {
var str = '<div class="dTreeNode">' + this.indent(node, nodeId);
if (this.config.useIcons) {
if (!node.icon) node.icon = (this.root.id == node.pid) ? this.icon.root : ((node._hc) ? this.icon.folder : this.icon.node);
if (!node.iconOpen) node.iconOpen = (node._hc) ? this.icon.folderOpen : this.icon.node;
if (this.root.id == node.pid) {
node.icon = this.icon.root;
node.iconOpen = this.icon.root;
}
if(node._hc)
{
str += '<img align="absmiddle" id="i' + this.obj + nodeId + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';
}
else
{
if(node.chec)
{
str += '<input type="checkbox" onclick="selChes(this)" name="ids" value="'+node.chec+'" gbkvalue="'+node.name+'"><img align="absmiddle" id="i' + this.obj + nodeId + '" style="width:0;height:0" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';
}
else
{
str += '<img align="absmiddle" id="i' + this.obj + nodeId + '" src="' + ((node._io) ? node.iconOpen : node.icon) + '" alt="" />';
}
}
}
if (node.url) {
str += '<a id="s' + this.obj + nodeId + '" class="' + ((this.config.useSelection) ? ((node._is ? 'nodeSel' : 'node')) : 'node') + '" href="' + node.url + '"';
if (node.title) str += ' title="' + node.title + '"';
if (node.target) str += ' target="' + node.target + '"';
if (this.config.useStatusText) str += ' onmouseover="window.status=\'' + node.name + '\';return true;" onmouseout="window.status=\'\';return true;" ';
if (this.config.useSelection && ((node._hc && this.config.folderLinks) || !node._hc))
str += ' onclick="javascript: ' + this.obj + '.s(' + nodeId + ');"';
str += '>';
}
else if ((!this.config.folderLinks || !node.url) && node._hc && node.pid != this.root.id)
str += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');" class="node">';
str += node.name;
if (node.url || ((!this.config.folderLinks || !node.url) && node._hc)) str += '</a>';
str += '</div>';
if (node._hc) {
str += '<div id="d' + this.obj + nodeId + '" class="clip" style="display:' + ((this.root.id == node.pid || node._io) ? 'block' : 'none') + ';">';
str += this.addNode(node);
str += '</div>';
}
this.aIndent.pop();
return str;
};

// Adds the empty and line icons
dTree.prototype.indent = function(node, nodeId) {
var str = '';
if (this.root.id != node.pid) {
for (var n=0; n<this.aIndent.length; n++)
str += '<img align="absmiddle" src="' + ( (this.aIndent[n] == 1 && this.config.useLines) ? this.icon.line : this.icon.empty ) + '" alt="" />';
(node._ls) ? this.aIndent.push(0) : this.aIndent.push(1);
if (node._hc) {
str += '<span onclick="javascript: ' + this.obj + '.o(' + nodeId + ');"><img align="absmiddle" id="j' + this.obj + nodeId + '" src="';
if (!this.config.useLines) str += (node._io) ? this.icon.nlMinus : this.icon.nlPlus;
else str += ( (node._io) ? ((node._ls && this.config.useLines) ? this.icon.minusBottom : this.icon.minus) : ((node._ls && this.config.useLines) ? this.icon.plusBottom : this.icon.plus ) );
str += '" alt="" /></span>';
} else str += '<img align="absmiddle" src="' + ( (this.config.useLines) ? ((node._ls) ? this.icon.joinBottom : this.icon.join ) : this.icon.empty) + '" alt="" />';
}
return str;
};

[childbaby]

// Checks if a node has any children and if it is the last sibling
dTree.prototype.setCS = function(node) {
var lastId;
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].pid == node.id) node._hc = true;
if (this.aNodes[n].pid == node.pid) lastId = this.aNodes[n].id;
}
if (lastId==node.id) node._ls = true;
};

// Returns the selected node
dTree.prototype.getSelected = function() {
var sn = this.getCookie('cs' + this.obj);
return (sn) ? sn : null;
};

// Highlights the selected node
dTree.prototype.s = function(id) {
if (!this.config.useSelection) return;
var cn = this.aNodes[id];
if (cn._hc && !this.config.folderLinks) return;
if (this.selectedNode != id) {
if (this.selectedNode || this.selectedNode==0) {
eOld = document.getElementById("s" + this.obj + this.selectedNode);
eOld.className = "node";
}
eNew = document.getElementById("s" + this.obj + id);
eNew.className = "nodeSel";
this.selectedNode = id;
if (this.config.useCookies) this.setCookie('cs' + this.obj, cn.id);
}
};

// Toggle Open or close
dTree.prototype.o = function(id) {
var cn = this.aNodes[id];
this.nodeStatus(!cn._io, id, cn._ls);
cn._io = !cn._io;
if (this.config.closeSameLevel) this.closeLevel(cn);
if (this.config.useCookies) this.updateCookie();
};

// Open or close all nodes
dTree.prototype.oAll = function(status) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n]._hc && this.aNodes[n].pid != this.root.id) {
this.nodeStatus(status, n, this.aNodes[n]._ls)
this.aNodes[n]._io = status;
}
}
if (this.config.useCookies) this.updateCookie();
};

// Opens the tree to a specific node
dTree.prototype.openTo = function(nId, bSelect, bFirst) {
if (!bFirst) {
for (var n=0; n<this.aNodes.length; n++) {
if (this.aNodes[n].id == nId) {
nId=n;
break;
}
}
}
var cn=this.aNodes[nId];
if (cn.pid==this.root.id || !cn._p) return;
cn._io = true;
cn._is = bSelect;
if (this.completed && cn._hc) this.nodeStatus(true, cn._ai, cn._ls);
if (this.completed && bSelect) this.s(cn._ai);
else if (bSelect) this._sn=cn._ai;
this.openTo(cn._p._ai, false, true);
};

[zxcvbnmluton]

<div class="dtree">
<p><a href="javascript: d.openAll();">open all</a> | <a href="javascript: d.closeAll();">close all</a></p>
<script type="text/javascript">
<!--
d = new dTree('d');
d.add(0,-1,'My example tree');
d.add(1,0,'Node 1','example01.html');
d.add(2,0,'Node 2','example01.html');
d.add(3,1,'Node 1.1','example01.html');
d.add(4,0,'Node 3','example01.html');
d.add(5,3,'Node 1.1.1','example01.html');
d.add(6,5,'Node 1.1.1.1','example01.html');
d.add(7,0,'Node 4','example01.html');
d.add(8,1,'Node 1.2','example01.html');
d.add(9,0,'My Pictures','example01.html','Pictures I\'ve taken over the years','','','img/imgfolder.gif');
d.add(10,9,'The trip to Iceland','example01.html','Pictures of Gullfoss and Geysir');
d.add(11,9,'Mom\'s birthday','example01.html');
d.add(12,0,'Recycle Bin','example01.html','','','img/trash.gif');
document.write(d);
//-->
</script>
</div>

[childbaby]

顶，是不是我描述的不清楚？还是分太少

[meizz]

向写这个树代码的作者咨询，这些个人写的树