网站流量统计代码可以用javascript实现么？

通常说的网站流量（traffic）是指网站的访问量，是用来描述访问一个网站的用户数量以及用户所浏览的网页数量等指标。

网站一般都有访问量统计工具，比较高效实用的工具多种多样，并且非常的精确。实用javascript也可以简单的实现此功能，尽管没有网络上常用的精确，不过的确也实现了一定的功能。

JavaScript实现统计网站流量的方法：

/** 
 * 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 { 
    setStatId(); 
    return getStatId(); 
  } 
} 
/** 
 * 获取UA 
 */
function getUA() { 
  var ua = navigator.userAgent; 
  if (ua.length > 250) { 
    ua = ua.substring(0, 250); 
  } 
  return ua; 
} 
/** 
 * 获取浏览器类型 
 */
function getBrower() { 
  var ua = getUA(); 
  if (ua.indexOf("Maxthon") != -1) { 
    return "Maxthon"; 
  } else if (ua.indexOf("MSIE") != -1) { 
    return "MSIE"; 
  } else if (ua.indexOf("Firefox") != -1) { 
    return "Firefox"; 
  } else if (ua.indexOf("Chrome") != -1) { 
    return "Chrome"; 
  } else if (ua.indexOf("Opera") != -1) { 
    return "Opera"; 
  } else if (ua.indexOf("Safari") != -1) { 
    return "Safari"; 
  } else { 
    return "ot"; 
  } 
} 
/** 
 * 获取浏览器语言 
 */
function getBrowerLanguage() { 
  var.browserLanguage; 
  return lang != null && lang.length > 0 ? lang : ""; 
} 
/** 
 * 获取操作系统 
 */
function getPlatform() { 
  return navigator.platform; 
} 
/** 
 * 获取页面title 
 */
function getPageTitle() { 
  return document.title; 
} 
/** 
 * 创建一个form 
 * 
 * @return 
 */
function createSubmitForm() { 
  var frm = document.createElement("form"); 
  document.body.appendChild(frm); 
  frm.method = "POST"; 
  return frm; 
} 
/** 
 * 为form创建一个元素 
 * 
 * @param inputForm 
 * @param elementName 
 * @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); 
            } 
          } 
        } catch (e) { 
          alert("Error XMLHttpRequest!"); 
        } 
      } 
    } 
  } else { 
    alert("Error initializing XMLHttpRequest!"); 
  } 
} 
function vlstatInitLE(vlch, vlch1, vlch2, vlch3) { 
  var p; 
  var vlstatCH = vlch != null && vlch.length > 0 ? vlch : ""; 
  var vlstatCH1 = vlch1 != null && vlch1.length > 0 ? vlch1 : ""; 
  var vlstatCH2 = vlch2 != null && vlch2.length > 0 ? vlch2 : ""; 
  var vlstatCH3 = vlch3 != null && vlch3.length > 0 ? vlch3 : ""; 
  var vlstatCookieId = getStatId(); 
  var vlstatUA = encodeURIComponent(getUA()); 
  var vlstatIPAddress = document.localName; 
  var vlstatREFURL = encodeURIComponent(document.referrer); 
  var vlstatURL = encodeURIComponent(document.URL); 
  var vlstatScreenX = screen.width; 
  var vlstatScreenY = screen.height; 
  var vlstatOS = getPlatform(); 
  var vlstatBrower = getBrower(); 
  var vlstatBrowerLanguage = getBrowerLanguage(); 
  var vlstatPageTitle = encodeURIComponent(getPageTitle()); 
  var vlstatAction = "index.php"; 
  p = "cookieId=" + vlstatCookieId + "&ua=" + vlstatUA + "&ip=" + vlstatIPAddress + "&refurl="
      + vlstatREFURL + "&url=" + vlstatURL + "&screenX=" + vlstatScreenX + "&screenY=" + vlstatScreenY 
      + "&os=" + vlstatOS + "&brower=" + vlstatBrower + "&browerLang=" + vlstatBrowerLanguage 
      + "&title=" + vlstatPageTitle + "&ch=" + vlstatCH + "&ch1=" + vlstatCH1 + "&ch2=" + vlstatCH2 
      + "&ch3=" + vlstatCH3; 
  var urlGo = vlstatAction + "?" + p; 
  createXMLHttpRequest(); 
  xmlHttp.open('GET', urlGo); 
  xmlHttp.send(null); 
}

网站流量对于虚拟空间商来说流量是指：用户在访问网站过程中，产生的数据量大小，有的虚拟空间商限制了流量的大小，当超过网站流量这个量该网站就不能访问了。

网站流量统计主要指标包括：