var req

function ajaxNewMessageCount(path){
    //create head
    req = newXMLHttpRequest();
    
    //post url
    var url = path + "/customerAction.ui?method=getNewMessageCount";
    req.open("POST", url, true);
    req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    
    //get request
    req.onreadystatechange = setNewMessageValue;
    req.send("");
}

function setNewMessageValue(){
    if (req.readyState==4 && req.status==200) {//判断状态，4是已发送，200已完成
        if (document.getElementById("getNewMessageCount")!=null){
            document.getElementById("getNewMessageCount").innerText = req.responseText;
        }
    }
}