/***********************************************/
//Uhrzeit einblenden
/***********************************************/
function myclock()
    {
    var now = new Date();
    var clock=document.getElementById('clock');

    var h=now.getHours();
    var m=now.getMinutes();
    var s=now.getSeconds();
    
    if (m < 10) m="0" + m;
    if (s < 10) s="0" + s;
    
    clock.textContent=h+":"+m+":"+s;
    window.setTimeout("myclock();",800);
    }
    
/***********************************************/
//Felder ein und Ausblenden
/***********************************************/
function showhidestuff(fieldid)
    {
    switch (document.getElementById(fieldid).style.visibility)
        {
        case '': document.getElementById(fieldid).style.visibility="visible"; break
        case 'hidden': document.getElementById(fieldid).style.visibility="visible"; break
        case 'visible': document.getElementById(fieldid).style.visibility="hidden"; break
        }
    }