Применения AJAX в AdsManager - AdsManager

<a href='javascript:void(0);' class='adsmsanger_ajax' onClick='ajax_test($row->id,this)'>ТЕСТИРУЕМ Ajax</a>

<script type="text/javascript">
			function ajax_test(id,el){
				var url = '/index2.php?option=<?=$option?>&page=ajax_test&id='+id+'&no_html=1';	
			    if (window.XMLHttpRequest) {
			        req = new XMLHttpRequest();
			        req.open("GET", url, true);
			        req.send(null);
			    }else if (window.ActiveXObject){
			        req = new ActiveXObject("Microsoft.XMLHTTP");
			        if (req) {
			            req.open("GET", url, true);
			            req.send();
			        }
			    }
			    req.onreadystatechange = function(){
			    if (req.readyState == 4)  {
					el.innerHTML = req.responseText;
					el.setAttribute('onclick','');
			    }       
			    } 
				
			}
			</script>

case 'ajax_test':{
             ajax_test();
			break;
			}

function  ajax_test(){
    global $database;
	$option = mosGetParam($_GET,'option', "" );
	$id = mosGetParam($_GET,'id', "" );
	$database->setQuery("UPDATE #__adsmanager_ads SET flag_top=1 WHERE id=$id");
	$database->query();
	header('Content-type: text/html; '._ISO);
	echo "Ура работает";
	exit;