window.called = function(event, link, id){

    event.preventDefault();

    event.stopImmediatePropagation();

    var theUrl = "counter.php";

    var xmlHttp = null;

​

    xmlHttp = new XMLHttpRequest();

    xmlHttp.onreadystatechange=function(){

        if (this.readyState != 4)

            return;

        window.location.href = link.href.value;

    };

    xmlHttp.open("GET", theUrl, true);

    xmlHttp.send("id="+id);

    return false;

};