function CheckNull(ObjInput,InputTitle)
{
    if (ObjInput.value.trim() == "")
    {
        alert("请输入" + InputTitle);
        return false;
    }
    else
    {
        return true;
    }
}

function showHideMenu(i,show)
{
    //var menuC = document.getElementById("menuC");
    var menuItem = document.getElementById("RootMenu" + i.toString());
    var display=show?"block":"none";
    var classname=show?"main_nav_hover":"main_nav";
    menuItem.getElementsByTagName("ul")[0].style.display=display;
    menuItem.getElementsByTagName("h2")[0].className=classname;
}

//
// 添加收藏夹
//
function  bookmarksite(stitle,surl)
{
    try
    {
        window.external.addFavorite(surl,stitle);
    }
    catch(e)
    {
        try
        {
            window.sidebar.addPanel(stitle,surl,"");
        }
        catch(e)
        {
            alert("加入收藏失败，请使用Ctrl+D进行添加");
        }
    }
}

//
//设为首页
//
function setHomepage(url)
{
    try
    {
        setHomepage(url);
    }
    catch(e)
    {
        if (window.sidebar)
        {
            if(window.netscape)
            {
                try
                {  
                    netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");  
                }  
                catch (e)  
                {  
                    alert( "该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true" );  
                }
            }
            var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components. interfaces.nsIPrefBranch);
            prefs.setCharPref('browser.startup.homepage',url);
        }
    }
}

 function showUl(v){
	 document.getElementById(v).style.display='block';
	 };
 function hideUl(v){
	 document.getElementById(v).style.display='none';
	 }