var status=0; 
function sh(id) 
{ 
  if(status==0){ 
    document.getElementById(id).style.display = 'block'; 
    status=1; 
  } 
  else{ 
    document.getElementById(id).style.display = 'none'; 
    status=0; 
  }   
}
	function fenster(url,name,features) {
		WindowHandler = window.open(url,name,features);
		WindowHandler.focus();
	}