function showhide(x,a,icon)


{
  if(a.id == 'active'){
    document.getElementById(x).style.display = 'none';
  	a.id='hidden';   
	document.getElementById(icon).src='fileadmin/templates/arrow-open.gif';

  }
  else{
    document.getElementById(x).style.display = 'block';
  	a.id='active';   
	document.getElementById(icon).src='fileadmin/templates/arrow-close.gif';
  }
}