AJAX extension

Method	Description	Available form version
BX.ajax	Low-level function to send Ajax requests.
BX.ajax.Setup	Specifies the by-default values for parameters of [link=653461]ajax requests[/link].
BX.ajax.get	Simple GET query sending and passing the result to a handler.
BX.ajax.post	Simple POST query sending and passing of the result to a handler.
BX.ajax.insertToNode	Request data by the specified address and inserts reply into a specified container.
BX.ajax.load	Loads the resource query abd calls a handler.
BX.ajax.loadJSON	Loads a JSON-object from the specified URL and passes it to a handler.
BX.ajax.loadScriptAjax	Loads and executes a script or series of scripts.

Example

<?
require($_SERVER["DOCUMENT_ROOT"]."/bitrix/header.php");
$APPLICATION->SetTitle("AJAX");
   CJSCore::Init(array('ajax'));
   $sidAjax = 'testAjax';
if(isset($_REQUEST['ajax_form']) && $_REQUEST['ajax_form'] == $sidAjax){
   $GLOBALS['APPLICATION']->RestartBuffer();
   echo CUtil::PhpToJSObject(array(
            'RESULT' => 'HELLO',
            'ERROR' => ''
   ));
   die();
}

?>
<div class="group">
   <div id="block"></div >
   <div id="process">wait ... </div >
</div>
<script>
   window.BXDEBUG = true;
function DEMOLoad(){
   BX.hide(BX("block"));
   BX.show(BX("process"));
   BX.ajax.loadJSON(
      '<?=$APPLICATION->GetCurPage()?>?ajax_form=<?=$sidAjax?>',
      DEMOResponse
   );
}
function DEMOResponse (data){
   BX.debug('AJAX-DEMOResponse ', data);
   BX("block").innerHTML = data.RESULT;
   BX.show(BX("block"));
   BX.hide(BX("process"));

   BX.onCustomEvent(
      BX(BX("block")),
      'DEMOUpdate'
   );
}

BX.ready(function(){
   /*
   BX.addCustomEvent(BX("block"), 'DEMOUpdate', function(){
      window.location.href = window.location.href;
   });
   */
   BX.hide(BX("block"));
   BX.hide(BX("process"));
   
    BX.bindDelegate(
      document.body, 'click', {className: 'css_ajax' },
      function(e){
         if(!e)
            e = window.event;
         
         DEMOLoad();
         return BX.PreventDefault(e);
      }
   );
   
});

</script>
<div class="css_ajax">click Me</div>
<?require($_SERVER["DOCUMENT_ROOT"]."/bitrix/footer.php");?>