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');

  $(destid).innerHTML = '<div style="margin: 10% auto; text-align:center;" class="ajax_indicator"></div>';

  var myAjax = new Request.HTML({
           url: $(form).getProperty('action'),
           method: $(form).getProperty('method'), 

           data: $(form).toQueryString() + adddata, 

           update: $(destid),

           evalScripts: true

       }

  );

  myAjax.send();



  //damit das Formular nicht nochmal abgeschickt wird                                             

  return false;

}



function getSelectOptions(url, destid){

  $(destid).innerHTML = '';

//  $(destid).innerHTML = '<div style="margin: 10% auto; text-align:center;" class="ajax_indicator"></div>';

  var myAjax = new Request({
                       url: url,
                       method: 'get',

                       onComplete: function(responseText) { 

  	                   							 var optionsArr=responseText.split(";");

  								                   $A(optionsArr).each(function(option) {   

  								                     option = option.split(",");
  								                     if (option[1]){

                       	                 $newoption = new Element('option', {

                                                  			'value': option[1]

                                            	         	}).set('html',option[0]);                     

  									                     $(destid).adopt($newoption);
  									                   }

  								                   })

  								                   if ($(destid).onchange)  $(destid).onchange();

                                   }

  			              }

                     ).send();

} 			



function getStringFromURL(url, funktion){

  var response = "";

  var myAjax = new Request({
                       url: url,

          			       method: 'get',

                       onComplete: funktion

  			              }

                     ).send();

}