function abdunkeln (){
Element.hide('hgdunkel');
setTimeout("new Effect.Appear ('hgdunkel', {duration:5}),6000");
};

function aufhellen (){
Element.show('hgdunkel');
new Effect.Fade('hgdunkel', {duration:5});
};


function aufpoppen (){
Element.hide('whitecontentbg');
setTimeout("new Effect.Grow ('whitecontentbg', {duration:0.6}),100");
};