function menuin()
{
document.getElementById('lm').style.display = 'block'; 
document.getElementById('fcontent').style.marginLeft = '150';
document.getElementById('fcontent').style.marginRight = '150';
document.getElementById('rm').style.display = 'block'; 
cowrite('menu', 'ja');
}



function menuout()
{

 document.getElementById('fcontent').style.marginLeft = 0;
document.getElementById('fcontent').style.marginRight = 0;
document.getElementById('lm').style.display = 'none'; 
document.getElementById('rm').style.display = 'none'; 
cowrite('menu', 'nein');
}