function createRequestObject() 
{
    var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer"){
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }else{
        ro = new XMLHttpRequest();
    }
    return ro;
}

var http = createRequestObject();

function clicktrack(linkurl) 
{
    http.open('get', '/clicktrack.cfm?link='+linkurl + '&sid=' + Math.random());
    http.onreadystatechange = handleResponse;
    http.send(null);
}

function handleResponse() { }