function makeHttpRequest(url, callback_function, return_xml)
{
   var http_request = false;

   if (window.XMLHttpRequest) { // Mozilla, Safari,...
       http_request = new XMLHttpRequest();
       if (http_request.overrideMimeType) {
           http_request.overrideMimeType('text/xml');
       }

   } else if (window.ActiveXObject) { // IE
       try {
           http_request = new ActiveXObject("Msxml2.XMLHTTP");
       } catch (e) {
           try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
           } catch (e) {}
       }
   }

   if (!http_request) {
       //alert('Dados não formatado.');
       return false;
   }
   http_request.onreadystatechange = function() {
       if (http_request.readyState == 4) {
           if (http_request.status == 200) {
               if (return_xml) {
                   eval(callback_function + '(http_request.responseXML)');
               } else {
                   eval(callback_function + '(http_request.responseText)');
               }
           } else {
               //alert('Erro de requisição.(Codigo: ' + http_request.status + ')');
           }
       }
   }
   http_request.open('GET', url, true);
   http_request.send(null);
}

function loadBanner(xml)
{
    var html_contentblp = xml.getElementsByTagName('contentblp').item(0).firstChild.nodeValue;
    var reloadblp_after = xml.getElementsByTagName('reloadblp').item(0).firstChild.nodeValue;
	var ident_blp = xml.getElementsByTagName('idblp').item(0).firstChild.nodeValue;
    document.getElementById('ajax-banner-blp').innerHTML = html_contentblp;

    try {
        clearTimeout(to);
    } catch (e) {}
	
    to = setTimeout("nextAd("+ ident_blp +")", parseInt(reloadblp_after));
}

function nextAd(ident_blp)
{
    var now = new Date();
	var idblp = ident_blp;
    var url = 'http://www.123achei.com.br/publicidade/banner/ajax_banner_blp.php?ts=' + now.getTime() + '&idblp=' + idblp;
    makeHttpRequest(url, 'loadBanner', true);
}

window.onload = nextAd();