function add_favorite(id_ro, div_id){
	var req;
//	alert('YYY');
    if (window.XMLHttpRequest) {
   	    req = new XMLHttpRequest();
    } else if (window.ActiveXObject) {
       	req = new ActiveXObject("Msxml2.XMLHTTP");
   	}
   	req.onreadystatechange = function()
	{
		if (req.readyState == 4) {
			if (req.status == 200) {
//				alert(req.responseText);
				if (req.responseText == 'OK') {
					document.getElementById(div_id).innerHTML = '';
				}
			}
			else {
				alert('Error AJAX');
			}
		}
	}
	req.open('GET', url+'pages/ajax/add_to_favorite.php?id_ro='+id_ro, true);
    if (window.XMLHttpRequest) {
		req.send(null);
    } else if (window.ActiveXObject) {
    	req.send();
    }
}