function BookMark_AddNewBookMark(articleGUID)
{
    try
    {        
        var textBox_ArticleGUID = document.getElementById(TextBox_ArticleGUID_ClientID);
        textBox_ArticleGUID.value = articleGUID;
        var prm = Sys.WebForms.PageRequestManager.getInstance();
        prm._doPostBack(Button_AddNewBookMark_UniqueID, '');
    }
    catch(Error)
    {
        alert('Log on to create bookmarks');
    }
}

function BookMark_PreDeleteBookMark(bookMarkGUID) 
{
    var textBox_BookMarkGUID = document.getElementById(TextBox_BookMarkGUID_ClientID);
    textBox_BookMarkGUID.value = bookMarkGUID;
    var prm = Sys.WebForms.PageRequestManager.getInstance();
    prm._doPostBack(Button_DeleteBookMar_UniqueID, '');
}

function BookMark_DeleteBookMark() 
{
    var textBox_BookMarkGUID = document.getElementById(TextBox_BookMarkGUID_ClientID);
    if(textBox_BookMarkGUID.value.length > 0)
    {
        var prm = Sys.WebForms.PageRequestManager.getInstance();
        prm._doPostBack(Button_DeleteBookMar_UniqueID, '');
    }
}