js建立多级菜单,点击链接时不能显示在右框,而在浏览器新页面中显示


 for (int i = 0; i < menu.Rows.Count; i++)
            {
                if (menu.Rows[i]["parentid"].ToString() == "0")
                {
                    LblTree.Text += "treeMenuAddItem(1, \"" + menu.Rows[i]["menuname"] + "\");\n";                    for (int j = 0; j < menu.Rows.Count; j++)
                    {
                        if (menu.Rows[i]["menuid"].ToString() == menu.Rows[j]["parentid"].ToString())
                        {
                            if (menu.Rows[j]["weburl"].ToString() != "")
                            {
                                LblTree.Text += "treeMenuAddItem(2, \"" + menu.Rows[j]["menuname"] + "\", \"" + menu.Rows[j]["webUrl"]  + "\", \"tabWin\",\"l4.gif\");\n";
                            }
                            else
                            {
                                LblTree.Text += "treeMenuAddItem(2, \"" + menu.Rows[j]["menuname"] + "\");\n";                                for (int k = 0; k < menu.Rows.Count; k++)
                                {
                                    if (menu.Rows[j]["menuid"].ToString() == menu.Rows[k]["parentid"].ToString())
                                    {                                        LblTree.Text += "treeMenuAddItem(3, \"" + menu.Rows[k]["menuname"] + "\", \"" + menu.Rows[k]["webUrl"] + "\", \"tabWin\",\"l4.gif\");\n";
                                    }
                                }
                            }                        }
                    }
                }treeMenuAddItem 函数如下
function treeMenuAddItem(level, text, url, target, icon)
{

if (!target)
{
parentLevel=level;
if(level)
auxs[level] = auxs[level - 1].addChild(new Folder(text, url));
else auxs[0] = new Folder(text);
}
else
{if (target=="main"||target=="tabWin"||target=="_parent")
{
if(level>parentLevel + 1)level = parentLevel + 1;
auxs[level - 1].addChild(new Item(text, "'"+url+"' target='" + target + "'", icon));
}
else
{
parentLevel=level;
auxs[level] = auxs[level - 1].addChild(new Folder(text, url));
}
}
}一直不明白tabWin是什么意思   在JS中传值有什么用   在调用treeMenuAddItem 函数的页面中并没有给其赋值   不明白到底怎么使用?