function zeigemenus1() {
navi_loeschen()

document.getElementById('navi_forum').style.display='block';
document.getElementById('navi_forum_1').style.display='block';
}

function zeigemenus2() {
navi_loeschen()
document.getElementById('navi_portal').style.display='block';
document.getElementById('navi_portal_1').style.display='block';
}

function zeigemenus3() {
navi_loeschen()
document.getElementById('navi_commu').style.display='block';
document.getElementById('navi_commu_1').style.display='block';
}

function zeigemenus4() {
navi_loeschen()
document.getElementById('navi_kontakt').style.display='block';
}

function navi_loeschen() {
	
document.getElementById('navi_forum').style.display='none';
document.getElementById('navi_portal').style.display='none';
document.getElementById('navi_commu').style.display='none';
document.getElementById('navi_forum_1').style.display='none';
document.getElementById('navi_portal_1').style.display='none';
document.getElementById('navi_commu_1').style.display='none';
}

function moveDiv(divcontrol){

 var div=document.getElementById(divcontrol)
 var newpos=parseInt(div.style.top)+1
 
 div.style.top = newpos + "px"
 
 if(newpos<0){  // Here you put the value it should move to
 //alert("Schub" + newpos)
  setTimeout("moveDiv('login_header')",25) // Tweak the time to get a smooth movement.
 }
}
function zeigelogin(){
	
	document.getElementById('login_header').style.display='block';
	moveDiv('login_header');
}