JS 精确统计网站访问量程序

/**
 * vlstat 浏览器统计脚本
 */ 
 
var statIdName = "vlstatId"; 
var xmlHttp; 
 
/**
 * 设置cookieId
 */ 
function setCookie(c_name, value, expiredays) { 
    var exdate = new Date(); 
    exdate.setDate(exdate.getDate() + expiredays); 
    document.cookie = c_name + "=" + escape(value) + ((expiredays == null) ? "" : ";expires=" + exdate.toGMTString()) + ";path=/;domain=cecb2b.com"; 
} 
 
/**
 * 获取cookieId
 */ 
function getCookie(c_name) { 
    if (document.cookie.length > 0) { 
        c_start = document.cookie.indexOf(c_name + "="); 
        if (c_start != -1) { 
            c_start = c_start + c_name.length + 1; 
            c_end = document.cookie.indexOf(";", c_start); 
            if (c_end == -1) { 
                c_end = document.cookie.length; 
            } 
            return unescape(document.cookie.substring(c_start, c_end)); 
        } 
    } 
    return ""; 
} 
 
/**
 * 获取当前时间戳
 */ 
function getTimestamp() { 
    var timestamp = Date.parse(new Date()); 
    return timestamp; 
} 
 
/**
 * 生成statId
 */ 
function genStatId() { 
    var cookieId = getTimestamp(); 
    cookieId = "vlstat" + "-" + cookieId + "-" + Math.round(Math.random() * 3000000000); 
    return cookieId; 
} 
 
/**
 * 设置StatId
 */ 
function setStatId() { 
    var cookieId = genStatId(); 
    setCookie(statIdName, cookieId, 365); 
} 
 
/**
 * 获取StatId
 */ 
function getStatId() { 
    var statId = getCookie(statIdName); 
    if (statId != null && statId.length > 0) { 
        return statId; 
    } else {