var prev_news = "";
function news_on(who)
{
    if( prev_news != who )
    {
        if( prev_news )
        {
            document.getElementById( prev_news ).style.display = "none";
            document.getElementById( prev_news+"_icon"  ).style.border = "none";
        }
        document.getElementById( who ).style.display = "block";
        document.getElementById( who+"_icon"  ).style.border = "#aaa 1px solid";
        prev_news=who;
    }
    else
        if ( document.getElementById( who ).style.display == "block" )
        {
            document.getElementById( who ).style.display = "none";
            document.getElementById( who+"_icon"  ).style.border = "none";
        }
        else
        {
            document.getElementById( who ).style.display = "block";
            document.getElementById( who+"_icon"  ).style.border = "#aaa 1px solid";
        }
        
    return true;
}

var prev_art = "";
function art_on(who)
{
    if( prev_art != who )
    {
        if( prev_art )
        {
            document.getElementById( prev_art ).style.display = "none";
            document.getElementById( prev_art+"_icon"  ).style.border = "none";
        }
        document.getElementById( who ).style.display = "block";
        document.getElementById( who+"_icon"  ).style.border = "#aaa 1px solid";
        prev_art=who;
    }
    else
        if ( document.getElementById( who ).style.display == "block" )
        {
            document.getElementById( who ).style.display = "none";
            document.getElementById( who+"_icon"  ).style.border = "none";
        }        
        else
        {
            document.getElementById( who ).style.display = "block";
            document.getElementById( who+"_icon"  ).style.border = "#aaa 1px solid";
        }
            
    return true;
}