function Post(panelName,siteId)
{   
    if (document.getElementById('HF_ContentId').value != siteId || document.getElementById('HF_ContentName').value != panelName)
    {
        document.getElementById('HF_ContentId').value = siteId;
        document.getElementById('HF_ContentName').value = panelName;
        __doPostBack('UP_Content', '');
    }
}