var newWin = null; 
function openC() 
{
	if (newWin != null && !newWin.closed) 
	newWin.close(); 

	bildschirmx = screen.availWidth;
	bildschirmy = screen.availHeight;
	breite = '450';
	hoehe = '550';
	startx = Math.round((bildschirmx / 2)- (breite / 2) - 10);
	starty = Math.round((bildschirmy / 2) - (hoehe / 2) - 20);
	newWin = window.open("./contactform.php","neu","width="+breite+",height="+hoehe+",status=no,toolbar=no,menubar=no,resizable=no,scrollbars=no,screenX="+startx+",left="+startx+",screenY="+starty+",top="+starty+"");
	newWin.focus(); 
}

function showhide(obj) 
{    
	if(document.getElementById(obj).style.display == 'none') { 
		document.getElementById(obj).style.display = 'block'; 
	}
	else { 
		document.getElementById(obj).style.display = "none"; 
	}
}