function mittler()
{
	jvar = (document.body.clientWidth - 800) / 2;
	document.getElementById('inhalt').style.left = jvar;
	kvar = (document.body.clientHeight - 590) / 2;
	document.getElementById('inhalt').style.top = kvar;
}
function hgfarbe(feldname,farbe)
{
	document.getElementById(feldname).style.backgroundColor = farbe;
}

function hgbild(feldname,url)
{
	document.getElementById(feldname).style.backgroundImage = "url(../layout/"+url+")";
}