var req;

function createAjaxRequest() {
    var ajaxReq;
    if (window.XMLHttpRequest) { // Non-IE browsers
       ajaxReq = new XMLHttpRequest();
   }
    else if (window.ActiveXObject) { // IE
            ajaxReq = new ActiveXObject("Microsoft.XMLHTTP");
        }
    return ajaxReq;
}

function cliqueAjax(ctx,  id) {
   var url = ctx + "/clique.incrementaCliqueAjax.mtw?id=" + id;
   req = createAjaxRequest();
   if (window.XMLHttpRequest) { // Non-IE browsers
   try {        
           req.open("GET", url, true);
       } catch (e) { 
           alert(e);
       }
       req.send(null);
    } 
    else if (window.ActiveXObject) { // IE
       if (req) {
          req.open("GET", url, true);
            req.send();
        }
    }    
}