function checkOnlineForm()
{
	var error = false;
	// hole zu prüfende elemente
	var required = $('required').value;
	// wandel string in array
	required = required.split(",");
	// ermittel die anzahl der zu prüfenden elemente
	var required_len = required.length;
	
	for(var i = 0; i< required_len; i++)
	{
		if($(required[i]))
		{		
			if($(required[i]).value == '')
			{
				error = true;
				$(required[i]).setStyle({				
					background:'#FFC6C6'
				});			
			}
			else
			{
				$(required[i]).setStyle({				
					background:'#FFF'
				});			
			}
		}		
	}
	
	if(error)
	{
		alert("Bitte fuellen Sie alle Felder, die mit * gekennzeichnet sind, aus.");
		return false;
	}
	return true;
	
}