var request;

function doSingleAjaxRequest(url, destid, hideplaceholder){
  if (request && request.cancel){
    request.cancel();
  }
  if (hideplaceholder === undefined){
    $(destid).innerHTML = '<div style="margin: 10% auto; text-align:center;" class="ajax_indicator"></div>';
  }
  
  var myAjax = new Request.HTML({
           url: url, 
           method: 'get', 
           update: $(destid),
           evalScripts: true,
       }
  );
  myAjax.send();
  
  request = myAjax;
  return false;
}


// Funktion doAjaxRequest(url, destid, hideplaceholder)
// Parameter:
// url:    URL der Seite, die im Element destid angezeigt werden soll
// destid: Ziel-Element
// hideplaceholder: Placeholder nicht anzeigen

function doAjaxRequest(url, destid, hideplaceholder){
  if (hideplaceholder === undefined){
    $(destid).innerHTML = '<div style="margin: 10% auto; text-align:center;" class="ajax_indicator"></div>';
  }
  
  var myAjax = new Request.HTML({
           url: url, 
           method: 'get', 
           update: $(destid),
           evalScripts: true,
       }
  );
  myAjax.send();
    
  return false;
}

function doAjaxPostRequest(url, destid, data, hideplaceholder){
  if (hideplaceholder === undefined){
    $(destid).innerHTML = '<div style="margin: 10% auto; text-align:center;" class="ajax_indicator"></div>';
  }
  var myAjax = new Request.HTML({
           url: url,
           method: 'post', 
           data: data,
           update: $(destid),
           evalScripts: true
       }
  );
  myAjax.send();
  
  return false;  
}

function doAjaxSendForm(form, destid, adddata){
  //$(destid).addClass('ajax_indicator');
  var myAjax = new Request.HTML({
           url: $(form).getProperty('action'),
           method: $(form).getProperty('method'), 
           data: $(form).toQueryString() + adddata, 
           update: $(destid),
           evalScripts: true
       }
  );
  $(destid).innerHTML = '<div style="margin: 10% auto; text-align:center;" class="ajax_indicator"></div>';
  myAjax.send();

  //damit das Formular nicht nochmal abgeschickt wird                                             
  return false;
}

function getSelectOptions(url, destid, selected_index, show_error){
  if (show_error === undefined) var show_error = true;
  var myAjax = new Request.JSON({
                       url: url,
                       method: 'get',
                       onError: function (text, error){
                         if (eos_ErrorBox){
                           var error_msg = new eos_ErrorBox(text);
                           error_msg.open();
                         }else{
                           alert(text);
                         }
                       },
                       onComplete: function(jsonObj,txt) {
                                     var msg = 'Fehler';
                                     var fehler = false;
                                     if (jsonObj == null){
                                       msg = txt;
                                       fehler = true;
                                     }else if(jsonObj.hasOwnProperty('message') && jsonObj.message.length){
                                       msg = jsonObj.message;
                                       fehler = true;
                                     }
                                     if (fehler && show_error){                                          
                                       var error_msg = new eos_ErrorBox(msg);
                                       error_msg.open();
                                     }
                                     if (jsonObj.hasOwnProperty('data')){
                                       $(destid).innerHTML = '';                                     
                                       Object.each(jsonObj.data,function(value,option_id) {
                       	                 var newoption = new Element('option', {
                                                  			'value': option_id
                                            	         	}).set('html',value);
                                         if (selected_index == option_id) newoption.set('selected','selected');
  									                     $(destid).adopt(newoption);                                
                                       });
                                     }
                                     $(destid).fireEvent('change');
                                   }
  			              }
                     ).send();
} 			

function getStringFromURL(url, funktion){
  var response = "";
  var myAjax = new Request({
                       url: url,
          			       method: 'get',
                       onComplete: funktion
  			              }
                     ).send();
}