private void addCheckScript_Click(object sender, EventArgs e)
        {
            ScriptSelector selector = new ScriptSelector(tree.Nodes["root"], true);

            if (selector.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                ConversationNode node = tree.SelectedNode.Tag as ConversationNode;
                node.checkScript            = selector.scriptName;
                node.checkScriptDescription = selector.scriptDescription;

                checkScript.Text = selector.scriptName;
            }
            else
            {
                checkScript.Text = (tree.SelectedNode.Tag as ConversationNode).checkScript;
            }
        }
        private void addExecuteScript_Click(object sender, EventArgs e)
        {
            ScriptSelector selector = new ScriptSelector(tree.Nodes["root"], false);

            if (selector.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                ConversationNode node = tree.SelectedNode.Tag as ConversationNode;
                node.executeScripts.Add(selector.scriptName);
                node.executeScriptDescriptions.Add(selector.scriptDescription);
                executeScripts.Items.Add(selector.scriptName);
            }
            else
            {
                executeScripts.Items.Clear();
                foreach (string str in (tree.SelectedNode.Tag as ConversationNode).executeScripts)
                {
                    executeScripts.Items.Add(str);
                }
            }
        }