修改dtree.js 实现点击节点加载子节点

dtree.js修改后的代码：

// Node object
function Node(id, pid, name, url, cid, cpid, title, target, icon, iconOpen, open) {
    this.id = id.toString();
    if (pid != "undefined" && pid != null)
        this.pid = pid.toString();
    this.name = name;
    this.url = url;
    this.cid = cid;
    this.cpid = cpid;
    this.title = title;
    if (target != "")
        this.target = target;
    if (icon != "")
        this.icon = icon;
    if (iconOpen != "")
        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, targetID, type) {
    this.config = {
        target: null,
        folderLinks: false,
        useSelection: true,
        useCookies: true,
        useLines: true,
        useIcons: true,
        useStatusText: false,
        closeSameLevel: false,
        inOrder: false
    }
    this.icon = {
    root: 'http://images.cnblogs.com/ROOT.gif',
        folder: '../img/folder.gif',
        folderOpen: '../img/folderopen.gif',
        node: '../img/page.gif',
        empty: '../img/empty.gif',
        line: '../img/line.gif',
        join: '../img/join.gif',
        joinBottom: '../img/joinbottom.gif',
        plus: '../img/plus.gif',
        plusBottom: '../img/plusbottom.gif',
        minus: '../img/minus.gif',
        minusBottom: '../img/minusbottom.gif',
        nlPlus: '../img/nolines_plus.gif',
        nlMinus: '../img/nolines_minus.gif'
    };
    this.obj = objName;
    this.aNodes = [];
    this.aNodesData = [];
    this.targetID = targetID || 'dtree';
    this.type = type;
    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, cid, cpid, title, target, icon, iconOpen, open) {

    // Add by xiaosilent.
    this.completed = false;

    this.aNodesData[this.aNodesData.length] = new Node(id, pid, name, url, cid, cpid, title, target, icon, iconOpen, open);

};

// Add by xiaosilent.
// Call to show the tree.
dTree.prototype.show = function() {

    // Renew the two array to save original data.
    this.aNodes = new Array();
    this.aIndent = new Array();

    // Dump original data to aNode array.
    for (var i = 0; i < this.aNodesData.length; i++) {

        var id = this.aNodesData[i].id;
        var pid = this.aNodesData[i].pid;
        var name = this.aNodesData[i].name;
        var url = this.aNodesData[i].url;
        var cid = this.aNodesData[i].cid;
        var cpid = this.aNodesData[i].cpid;
        var title = this.aNodesData[i].title;
        var target = this.aNodesData[i].target;
        var icon = this.aNodesData[i].icon;
        var iconOpen = this.aNodesData[i].iconOpen;
        var open = this.aNodesData[i].open;
        this.aNodes[i] = new Node(id, pid, name, url, cid, cpid, title, target, icon, iconOpen, open);
    }
    this.rewriteHTML();
}

// Outputs the tree to the page , callled by show()
// Changed by xiaosilent.
// Renamed dTree.prototype.toString to this.
dTree.prototype.rewriteHTML = function() {

    var str = '';

    // Added by xiaosilent. 
    var targetDIV;
    targetDIV = document.getElementById(this.targetID);

    if (!targetDIV) {

        alert('dTree can\'t find your specified container to show your tree.\n\n Please check your code!');

        return;
    }
    if (this.config.useCookies) this.selectedNode = this.getSelected();

    str += this.addNode(this.root);


    // Disabled by xiaosilent.
    //    str += '</div>';

    if (!this.selectedFound) this.selectedNode = null;

    this.completed = true;


    // Disabled and added by xiaosilent.
    //return str;
    targetDIV.innerHTML = str;

};


// 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;
};

// 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._is) 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;
        }
        str += '<img  border=0  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 + ');' + this.obj + '.getChildren(\'' + node.cid + '\');" 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  border=0  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 += '<a href="javascript: ' + this.obj + '.o(' + nodeId + ');' + this.obj + '.getChildren(\'' + node.cid + '\');"><img  border=0  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="" /></a>';
        } else str += '<img  border=0 src="' + ((this.config.useLines) ? ((node._ls) ? this.icon.joinBottom : this.icon.join) : this.icon.empty) + '" alt="" />';
    }
    return str;
};



// 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;

    // Disabled by xiaosilent.

};

// 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);
};

// Closes all nodes on the same level as certain node
dTree.prototype.closeLevel = function(node) {
    for (var n = 0; n < this.aNodes.length; n++) {
        if (this.aNodes[n].pid == node.pid && this.aNodes[n].id != node.id && this.aNodes[n]._hc) {
            this.nodeStatus(false, n, this.aNodes[n]._ls);
            this.aNodes[n]._io = false;
            this.closeAllChildren(this.aNodes[n]);
        }
    }
}

// Closes all children of a node
dTree.prototype.closeAllChildren = function(node) {
    for (var n = 0; n < this.aNodes.length; n++) {
        if (this.aNodes[n].pid == node.id && this.aNodes[n]._hc) {
            if (this.aNodes[n]._io) this.nodeStatus(false, n, this.aNodes[n]._ls);
            this.aNodes[n]._io = false;
            this.closeAllChildren(this.aNodes[n]);
        }
    }
}

// Change the status of a node(open or closed)
dTree.prototype.nodeStatus = function(status, id, bottom) {
    eDiv = document.getElementById('d' + this.obj + id);
    eJoin = document.getElementById('j' + this.obj + id);
    if (this.config.useIcons) {
        eIcon = document.getElementById('i' + this.obj + id);
        eIcon.src = (status) ? this.aNodes[id].iconOpen : this.aNodes[id].icon;
    }
    eJoin.src = (this.config.useLines) ?
    ((status) ? ((bottom) ? this.icon.minusBottom : this.icon.minus) : ((bottom) ? this.icon.plusBottom : this.icon.plus)) :
    ((status) ? this.icon.nlMinus : this.icon.nlPlus);
    eDiv.style.display = (status) ? 'block' : 'none';
};


// [Cookie] Clears a cookie
dTree.prototype.clearCookie = function() {
    var now = new Date();
    var yesterday = new Date(now.getTime() - 1000 * 60 * 60 * 24);
    this.setCookie('co' + this.obj, 'cookieValue', yesterday);
    this.setCookie('cs' + this.obj, 'cookieValue', yesterday);
};

// [Cookie] Sets value in a cookie
dTree.prototype.setCookie = function(cookieName, cookieValue, expires, path, domain, secure) {
    document.cookie =
        escape(cookieName) + '=' + escape(cookieValue)
        + (expires ? '; expires=' + expires.toGMTString() : '')
        + (path ? '; path=' + path : '')
        + (domain ? '; domain=' + domain : '')
        + (secure ? '; secure' : '');
};

// [Cookie] Gets a value from a cookie
dTree.prototype.getCookie = function(cookieName) {
    var cookieValue = '';
    var posName = document.cookie.indexOf(escape(cookieName) + '=');
    if (posName != -1) {
        var posValue = posName + (escape(cookieName) + '=').length;
        var endPos = document.cookie.indexOf(';', posValue);
        if (endPos != -1) cookieValue = unescape(document.cookie.substring(posValue, endPos));
        else cookieValue = unescape(document.cookie.substring(posValue));
    }
    return (cookieValue);
};

// [Cookie] Returns ids of open nodes as a string
dTree.prototype.updateCookie = function() {
    var str = '';
    for (var n = 0; n < this.aNodes.length; n++) {
        if (this.aNodes[n]._io && this.aNodes[n].pid != this.root.id) {
            if (str) str += '.';
            str += this.aNodes[n].id;
        }
    }
    this.setCookie('co' + this.obj, str);
};

// [Cookie] Checks if a node id is in a cookie
dTree.prototype.isOpen = function(id) {
    var aOpen = this.getCookie('co' + this.obj).split('.');
    for (var n = 0; n < aOpen.length; n++)
        if (aOpen[n] == id) return true;
    return false;
};

// If Push and pop is not implemented by the browser
if (!Array.prototype.push) {
    Array.prototype.push = function array_push() {
        for (var i = 0; i < arguments.length; i++)
            this[this.length] = arguments[i];
        return this.length;
    }
};
if (!Array.prototype.pop) {
    Array.prototype.pop = function array_pop() {
        lastElement = this[this.length - 1];
        this.length = Math.max(this.length - 1, 0);
        return lastElement;
    }
};

页面代码：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>无标题页</title>
    <script src="../js/jquery-1.7.js" type="text/javascript"></script>
    <link href="../js/dtree.css" rel="stylesheet" type="text/css" />
    <script src="../js/dtree.js" type="text/javascript"></script>
    <style type="text/css">
        a:link
        {
            COLOR: #333366; TEXT-DECORATION: none;
        }
        a:active
        {
            COLOR: #333366; TEXT-DECORATION: none;
        }
        a:visited
        {
            COLOR: #333366; TEXT-DECORATION: none;
        }

        a:hover
        {
            COLOR: #ff0000; TEXT-DECORATION: underline;
        }
        .node{vertical-align:super; }

    </style>
    
    
    <script type="text/javascript">
        d = new dTree('d', "mytree", 'goods');
        $.getJSON("../Controls/HandlerLocation.ashx?cid=0&flag=0" + "&id=" + Math.random(), function(data) {
        d.add("1", "-1", "根节点", "", "", "", "", "", "http://images.cnblogs.com/ROOT.gif", "http://images.cnblogs.com/ROOT.gif");
            $.each(data, function(K, V) {
                var id = V.ID.toString();
                var pid = V.PID.toString();
                var name = V.Name;
                var url = "javascript:d.getChildren('" + V.cid + "')";
                d.add(id, pid, name, url, V.cid, V.cid, '点击获取其子类', '', 'http://images.cnblogs.com/ROOT.gif', 'http://images.cnblogs.com/ROOT.gif');
            });

            d.show();
        });
        dTree.prototype.getChildren = function(cid) {
            var tree = this;
            $.getJSON("../Controls/HandlerLocation.ashx?cid=" + cid + "&id=" + Math.random(), function(data) {
                $.each(data, function(K, V) {
                    var id = V.ID.toString();
                    var pid = V.PID.toString();
                    var name = V.Name;
                    var url = "javascript:" + tree.obj + ".getChildren('" + V.cid + "')";
                    var i = 0;
                    var flag = false;
                    for (i; i < tree.aNodes.length; i++) {
                        if (tree.aNodes[i].id == id) {
                            flag = true;
                            break;
                        }
                    }

                    if (flag != true) {
                        if (V.cid.split('_').length == 2) {
                            tree.aNodesData[tree.aNodesData.length] = new Node(id, pid, name, url, V.cid, V.cid, '点击获取其子类', '', 'http://images.cnblogs.com/ku.gif', 'http://images.cnblogs.com/ku.gif');
                        } else {
                        tree.aNodesData[tree.aNodesData.length] = new Node(id, pid, name, url, V.cid, V.cid, '点击获取其子类', '', 'http://images.cnblogs.com/bn.jpg', 'http://images.cnblogs.com/bn.jpg');
                        }
                    }
                });
                tree.show();
            });
            parent.Locationinfo.location.href("Location_Edit.aspx?cid=" + cid + "&id=" + Math.random());
        }
    </script>
</head>
<body bgcolor="#ffffff">
    <form id="form1" method="post" runat="server">
    <div id="mytree" style="font-size: 11px">
    </div>
    </form>
</body>
</html>