function bland_change() {	
  	var myAjax = new Ajax.Request(
    "http://www.openclosed.de/script/echobl.php?quan=" + document.Formular.plz.value,
    { method: 'get', onComplete: alert_bland }	
  );
}

function alert_bland( originalRequest ) {
 	var bland = originalRequest.responseText;
	
	switch (bland) {
    case "Baden-WŸrttemberg": document.Formular.bundesland.options[1].selected = true;
                   break;
 
    case "Bayern": document.Formular.bundesland.options[2].selected = true;
                     break;
 
    case "Berlin": document.Formular.bundesland.options[3].selected = true;
                     break;
 
    case "Brandenburg": document.Formular.bundesland.options[4].selected = true;
                       break;
 
    case "Bremen": document.Formular.bundesland.options[5].selected = true;
                    break;
    case "Hamburg": document.Formular.bundesland.options[6].selected = true;
                   break;
 
    case "Hessen": document.Formular.bundesland.options[7].selected = true;
                     break;
 
    case "Mecklenburg-Vorpommern": document.Formular.bundesland.options[8].selected = true;
                     break;
 
    case "Niedersachsen": document.Formular.bundesland.options[9].selected = true;
                       break;
 
    case "Nordrhein-Westfalen": document.Formular.bundesland.options[10].selected = true;
                    break;
	         case "Rheinland-Pfalz": document.Formular.bundesland.options[11].selected = true;
                   break;
 
    case "Saarland": document.Formular.bundesland.options[12].selected = true;
                     break;
 
    case "Sachsen": document.Formular.bundesland.options[13].selected = true;
                     break;
 
    case "Sachsen-Anhalt": document.Formular.bundesland.options[14].selected = true;
                       break;
 
    case "Schleswig-Holstein": document.Formular.bundesland.options[15].selected = true;
                    break;
    case "ThŸringen": document.Formular.bundesland.options[16].selected = true;
                    break;
default: document.Formular.bundesland.options[0].selected = true;; 
	     
	     
	}
}