function logPageLoad(params) {
    var xhr = getXmlHttp();    
    if(!xhr) return false;
    var url = "/dental/code/logging/__log_pageload.php";
    params = params + "&width=" + screen.width + "&height=" + screen.height;
    params = params + "&browserwidth=" + window.innerWidth + "&browserheight=" + window.innerHeight;
    params = params + "&iewidth=" + document.body.offsetWidth + "&ieheight=" + document.body.offsetHeight;
    xhr.onreadystatechange = function() {
        if(xhr.readyState == 4) {
        }
    }

    xhr.open("POST", url, true);
    xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xhr.setRequestHeader("Content-length", params.length);
    xhr.setRequestHeader("Connection", "close");

    xhr.send(params);
}

function getXmlHttp() {
    var xmlHttp;
    try {
        xmlHttp = new XMLHttpRequest();
    }
    catch (e) {
        try {
            xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e) {
            try {
                xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
            }

            catch (e) {
                /*
                alert("Please download Mozilla Firefox");
                location.href = "http://www.mozilla.com";
                */
                return false;
            }
        }
    }
	return xmlHttp;

}