function BG()
{
	var c = document.getElementById('Content');
	var bg = document.getElementById('bg');
	var m = document.getElementById('mitteO');
	var rb = document.getElementById('rbild');
	var left = document.getElementById('left');
	var ml = document.getElementById('mitteL');
	var mr = document.getElementById('mitteR');
	var maxx = 0;
	var maxx2 = 0;
	
	if(m != null)
	{
		maxx = m.offsetHeight;
		if(m.offsetHeight < left.offsetHeight)
			maxx = left.offsetHeight;
		if(maxx < rb.offsetHeight)
			maxx = rb.offsetHeight;
		
		m.style.height = maxx - 19 + 'px';
		rb.style.height = maxx + 'px';
		left.style.height = maxx - 19 + 'px';
	}
	
	if(ml != null)
	{
		maxx2 = ml.offsetHeight;
		if(ml.offsetHeight < left.offsetHeight)
			maxx2 = left.offsetHeight;
		if(maxx2 < mr.offsetHeight)
			maxx2 = mr.offsetHeight;
		if(maxx2 < rb.offsetHeight)
			maxx2 = rb.offsetHeight;
		
		ml.style.height = maxx2 - 19 + 'px';
		mr.style.height = maxx2 - 19 + 'px';
		rb.style.height = maxx2 + 'px';
		left.style.height = maxx2 - 19 + 'px';
	}
	
	bg.style.top = c.offsetTop + 'px';
	bg.style.height = c.offsetHeight - 1 + 'px';
	bg.style.display = 'block';
}