function falschesFensterAn(domElem)
{
	document.body.insertBefore(domElem, document.body.firstChild);

	var bodyDecke = document.createElement('div');
	bodyDecke.id = 'bodyDecke';
	bodyDecke.style.height = 2 * document.viewport.getHeight() + 'px';
	document.body.insertBefore(bodyDecke, document.body.firstChild);
	
	domElem.show();
	window.scrollTo(0, 0);
}


function falschesFensterAus(domElem)
{
	domElem.hide();
	$('bodyDecke').remove();
}