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

// Tree object
function Tree(objName) {
    this.config = {
        target                    : null,
        folderLinks            : true,
        useSelection        : true,
        useCookies            : true,
        useLines                : true,
        useIcons                : true,
        useStatusText        : false,
        closeSameLevel    : false,
        inOrder                    : false
    }
    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
Tree.prototype.add = function(id, pid, name, url, title, target, icon,
+ iconOpen, open) {
    this.aNodes[this.aNodes.length] = new Node(id, pid, name, url, tit
+le, target, icon, iconOpen, open);
};

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

// Outputs the tree to the page
Tree.prototype.toString = function() {
    var str = '<div class="tree">\n';
    if (document.getElementById) {
        if (this.config.useCookies) this.selectedNode = this.getSelect
+ed();
        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
Tree.prototype.addNode = function(pNode) {
    var str = '';
    var n=0;
    var cn;
    if (this.config.inOrder) n = pNode._ai;
    for (n; n<this.aNodes.length; n++) {
        if (this.aNodes[n].pid == pNode.id) {
            cn = this.aNodes[n];
            cn._p = pNode;
            cn._ai = n;
            this.setCS(cn);
            if (!cn.target && this.config.target) cn.target = this.con
+fig.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
Tree.prototype.node = function(node, nodeId) {
    
    var str = '<div class="treeNode">' + 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.fol
+derOpen : this.icon.node;
        if (this.root.id == node.pid) {
            node.icon = this.icon.root;
            node.iconOpen = this.icon.root;
        }
        else // Ronnie add this line, we don't like the root node to d
+isplay
            str += '<img id="i' + this.obj + nodeId + '" src="' + ((no
+de._io) ? node.iconOpen : node.icon) + '" alt="" />';
    }
    if (node.url) {
        str += '<a id="s' + this.obj + nodeId + '" class="' + ((this.c
+onfig.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.st
+atus=\'' + node.name + '\';return true;" onmouseout="window.status=\'
+\';return true;" ';
        if (this.config.useSelection && ((node._hc && this.config.fold
+erLinks) || !node._hc))
            str += ' onclick="javascript: ' + this.obj + '.s(' + nodeI
+d + ');"';
        str += '>';
    }
    else if ((!this.config.folderLinks || !node.url) && node._hc && no
+de.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" styl
+e="display:' + ((this.root.id == node.pid || node._io) ? 'block' : 'n
+one') + ';">';
        str += this.addNode(node);
        str += '</div>';
    }
    this.aIndent.pop();
    return str;
};

// Adds the empty and line icons
Tree.prototype.indent = function(node, nodeId) {
    var str = '';
    if (this.root.id != node.pid) {
        for (var n=0; n<this.aIndent.length; n++)
            str += '<img src="' + ( (this.aIndent[n] == 1 && this.conf
+ig.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
+ + ');"><img id="j' + this.obj + nodeId + '" src="';
            if (!this.config.useLines) str += (node._io) ? this.icon.n
+lMinus : this.icon.nlPlus;
            else str += ( (node._io) ? ((node._ls && this.config.useLi
+nes) ? this.icon.minusBottom : this.icon.minus) : ((node._ls && this.
+config.useLines) ? this.icon.plusBottom : this.icon.plus ) );
            str += '" alt="" /></a>';
        } else str += '<img 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
Tree.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
Tree.prototype.getSelected = function() {
    var sn = this.getCookie('cs' + this.obj);
    return (sn) ? sn : null;
};

// Highlights the selected node
Tree.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.selec
+tedNode);
            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
Tree.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
Tree.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
Tree.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
Tree.prototype.closeLevel = function(node) {
    for (var n=0; n<this.aNodes.length; n++) {
        if (this.aNodes[n].pid == node.pid && this.aNodes[n].id != nod
+e.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
Tree.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.aNo
+des[n]._ls);
            this.aNodes[n]._io = false;
            this.closeAllChildren(this.aNodes[n]);        
        }
    }
}

// Change the status of a node(open or closed)
Tree.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):((botto
+m)?this.icon.plusBottom:this.icon.plus)):
    ((status)?this.icon.nlMinus:this.icon.nlPlus);
    eDiv.style.display = (status) ? 'block': 'none';
};


// [Cookie] Clears a cookie
Tree.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
Tree.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
Tree.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.subst
+ring(posValue, endPos));
        else cookieValue = unescape(document.cookie.substring(posValue
+));
    }
    return (cookieValue);
};

// [Cookie] Returns ids of open nodes as a string
Tree.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
Tree.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;
    }
};
[download]

<%@ page contentType="text/html; charset=UTF-8" %>

<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>


<html:html>

<head>
    <title></title>
    <link rel="stylesheet" type="text/css" href="<%=request.getContext
+Path()%>/css/tree.css">
    <script type="text/javascript" src="<%=request.getContextPath()%>/
+script/tree.js"></script>
    
    <script language="javascript">
        function changeContainerForMeteringData(id)
        {
            meteringDataContainersTree.openTo(id, false);
        }
    
    
        function changeMeterProxy(containerId, containerName, proxyMet
+erId, proxyMeterName, adasId)
        {
            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.containerId.value = containerId;
            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.containerName.value = containerName;
            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.proxyMeterId.value = proxyMeterId;
            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.proxyMeterName.value = proxyMeterName;
            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.adasId.value = adasId;

            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.dataSourceType.value = "MP";

            top.RightFrame.contentFrame.viewMeteringDataItems("CLICK_T
+REE");
        }
        
        
        function changeActiveElement(containerId, containerName, activ
+eElementId, activeElementName, activeElementType)
        {
            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.containerId.value = containerId;
            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.containerName.value = containerName;
            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.activeElementId.value = activeElementId;
            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.activeElementName.value = activeElementName;
            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.activeElementType.value = activeElementType;

            top.RightFrame.contentFrame.document.meteringDataQueryCond
+itionForm.dataSourceType.value = "AE";

            top.RightFrame.contentFrame.viewMeteringDataItems("CLICK_T
+REE");
        }
    </script>
</head>

<body bgcolor="#D3DDE3">
    <script type="text/javascript">
        <!--

        meteringDataContainersTree = new Tree("meteringDataContainersT
+ree");

        meteringDataContainersTree.icon.root = "<%=request.getContextP
+ath()%>/images/tree/empty.gif";
        meteringDataContainersTree.icon.folder = "<%=request.getContex
+tPath()%>/images/tree/folder.gif";
        meteringDataContainersTree.icon.folderOpen = "<%=request.getCo
+ntextPath()%>/images/tree/folderopen.gif";
        meteringDataContainersTree.icon.node = "<%=request.getContextP
+ath()%>/images/tree/page.gif";
        meteringDataContainersTree.icon.empty = "<%=request.getContext
+Path()%>/images/tree/empty.gif";
        meteringDataContainersTree.icon.line = "<%=request.getContextP
+ath()%>/images/tree/empty.gif";
        meteringDataContainersTree.icon.join = "<%=request.getContextP
+ath()%>/images/tree/empty.gif";
        meteringDataContainersTree.icon.joinBottom = "<%=request.getCo
+ntextPath()%>/images/tree/empty.gif";
        meteringDataContainersTree.icon.plus = "<%=request.getContextP
+ath()%>/images/tree/nolines_plus.gif";
        meteringDataContainersTree.icon.plusBottom = "<%=request.getCo
+ntextPath()%>/images/tree/nolines_plus.gif";
        meteringDataContainersTree.icon.minus = "<%=request.getContext
+Path()%>/images/tree/nolines_minus.gif";
        meteringDataContainersTree.icon.minusBottom = "<%=request.getC
+ontextPath()%>/images/tree/nolines_minus.gif";
        meteringDataContainersTree.icon.nlPlus = "<%=request.getContex
+tPath()%>/images/tree/nolines_plus.gif";
        meteringDataContainersTree.icon.nlMinus = "<%=request.getConte
+xtPath()%>/images/tree/nolines_minus.gif";

        meteringDataContainersTree.config.useCookies = false;

        meteringDataContainersTree.add(0, -1, "");

        <logic:iterate name="userContainersListForData" id="container"
+ type="com.landisgyr.nuwa.conweb.dto.dataPublish.ContainerDTO" scope=
+"session">
            meteringDataContainersTree.add("<bean:write name='containe
+r' property='id'/>",
                                           "<bean:write name='containe
+r' property='parentId'/>",
                                           "<bean:write name='containe
+r' property='name'/>",
                                           "javascript:changeContainer
+ForMeteringData('<bean:write name="container" property="id"/>');",
                                           "",
                                           "",
                                           "<%=request.getContextPath(
+)%>/images/common/blueDiamond.gif",
                                           "<%=request.getContextPath(
+)%>/images/common/blueDiamond.gif");
            <bean:define id="proxyMetersList" name="container" propert
+y="proxyMeters" />
            <logic:notEmpty name="proxyMetersList">
                <logic:iterate name="proxyMetersList" id="proxyMeter" 
+type="com.landisgyr.nuwa.conweb.dto.dataPublish.ProxyMeterDTO">
                    meteringDataContainersTree.add("<bean:write name='
+proxyMeter' property='id'/>",
                                                     "<bean:write name
+='container' property='id'/>",
                                                     "<bean:write name
+='proxyMeter' property='name'/> <bean:message key='global.leftParenth
+esis'/><bean:message key='dataPublish.prompt.proxyMeter'/><bean:messa
+ge key='global.rightParenthesis'/>",
                                                     "javascript:chang
+eMeterProxy('<bean:write name="container" property="id"/>', '<bean:wr
+ite name="container" property="name"/>', '<bean:write name="proxyMete
+r" property="id"/>', '<bean:write name="proxyMeter" property="name"/>
+', '<bean:write name="proxyMeter" property="adasId"/>');",
                                                     "",
                                                     "",
                                                     "<%=request.getCo
+ntextPath()%>/images/common/redDiamond.gif",
                                                     "<%=request.getCo
+ntextPath()%>/images/common/redDiamond.gif");
                </logic:iterate>
            </logic:notEmpty>
            <bean:define id="activeElementsList" name="container" prop
+erty="activeElements" />
            <logic:notEmpty name="activeElementsList">
                <logic:iterate name="activeElementsList" id="activeEle
+ment" type="com.landisgyr.nuwa.conweb.dto.dataPublish.ActiveElementDT
+O">
                    <logic:equal name="activeElement" property="type" 
+value="auxiliary_values">
                        meteringDataContainersTree.add("<bean:write na
+me='activeElement' property='id'/>",
                                                       "<bean:write na
+me='container' property='id'/>",
                                                       "<bean:write na
+me='activeElement' property='name'/> <bean:message key='global.leftPa
+renthesis'/><bean:message key='dataPublish.prompt.auxiliaryValue'/><b
+ean:message key='global.rightParenthesis'/>",
                                                       "javascript:cha
+ngeActiveElement('<bean:write name="container" property="id"/>', '<be
+an:write name="container" property="name"/>', '<bean:write name="acti
+veElement" property="id"/>', '<bean:write name="activeElement" proper
+ty="name"/>', '<bean:write name="activeElement" property="type"/>');"
+,
                                                       "",
                                                       "",
                                                       "<%=request.get
+ContextPath()%>/images/common/redDiamond.gif",
                                                       "<%=request.get
+ContextPath()%>/images/common/redDiamond.gif");
                    </logic:equal>
                    <logic:equal name="activeElement" property="type" 
+value="persistent_values">
                        meteringDataContainersTree.add("<bean:write na
+me='activeElement' property='id'/>",
                                                       "<bean:write na
+me='container' property='id'/>",
                                                       "<bean:write na
+me='activeElement' property='name'/> <bean:message key='global.leftPa
+renthesis'/><bean:message key='dataPublish.prompt.persistentValue'/><
+bean:message key='global.rightParenthesis'/>",
                                                       "javascript:cha
+ngeActiveElement('<bean:write name="container" property="id"/>', '<be
+an:write name="container" property="name"/>', '<bean:write name="acti
+veElement" property="id"/>', '<bean:write name="activeElement" proper
+ty="name"/>', '<bean:write name="activeElement" property="type"/>');"
+,
                                                       "",
                                                       "",
                                                       "<%=request.get
+ContextPath()%>/images/common/redDiamond.gif",
                                                       "<%=request.get
+ContextPath()%>/images/common/redDiamond.gif");
                    </logic:equal>
                </logic:iterate>
            </logic:notEmpty>
        </logic:iterate>
                    
         document.write(meteringDataContainersTree);
        // meteringDataContainersTree.openAll();

        //-->
    </script>
</body>

</html:html>
[download]

When customer click start button, containersTreeForMeteringData.jsp, which is create a tree object and add relative nodes to it, will be invoked. Recently, customers complained that IE often throw a warning box said that 'A script on this page is causing Internet Explore to run slowly..... do you want to abort the script?' when nodes is upto 1000.