JS 精确统计网站访问量程序(3)

 * @param elementValue
 * @return
 */ 
function createFormElement(frmInput, elementName, elementValue) { 
    var element = document.createElement("input"); 
    element.setAttribute("id", elementName); 
    element.setAttribute("name", elementName); 
    element.setAttribute("type", "hidden"); 
    element.setAttribute("value", elementValue); 
    frmInput.appendChild(element); 
    return element; 
} 
 
/**
 * 构造XMLHttpRequest对象
 * 
 * @return
 */ 
function createXMLHttpRequest() {   
    if (window.ActiveXObject) {   
        xmlHttp = new ActiveXObject('Microsoft.XMLHTTP');   
    } else if (window.XMLHttpRequest) {   
        xmlHttp = new XMLHttpRequest();   
    }   
} 
 
/**
 * url指定跳转页,data是要post的数据。func类似于函数指针
 * 
 * @param url
 * @param data
 * @param func
 * @return
 */ 
function AjaxPost(url, data, func) { 
    var httpRequest = createHttpRequest(); 
    if (httpRequest) { 
        httpRequest.open("POST", url, true); 
        httpRequest.setRequestHeader("content-length", data.length); 
        httpRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
        httpRequest.send(data); 
 
        httpRequest.onreadystatechange = function() { 
            if (httpRequest.readyState == 4) { 
                try { 
                    if (httpRequest.status == 200) { 
                        if (func) { 
                            // 这里可以调用想要的函数  
                            func(httpRequest.responseText);