javascript实现的网站访问量统计代码实例

<script type="text/javascript">
var caution=false
function setCookie(name,value,expires,path,domain,secure) 
{
  var curCookie=name+"="+escape(value) +
  ((expires)?";expires="+expires.toGMTString() : "") +
  ((path)?"; path=" + path : "") +
  ((domain)? "; domain=" + domain : "") +
  ((secure)?";secure" : "")
  if(!caution||(name + "=" + escape(value)).length <= 4000)
  {
   document.cookie = curCookie
  }
  else if(confirm("Cookie exceeds 4KB and will be cut!"))
  {
    document.cookie = curCookie
  }
}
function getCookie(name) 
{
  var prefix = name + "="
  var cookieStartIndex = document.cookie.indexOf(prefix)
  if (cookieStartIndex == -1)
  {
 return null
  }             
  var cookieEndIndex=document.cookie.indexOf(";",cookieStartIndex+prefix.length)
  if(cookieEndIndex == -1)
  {
 cookieEndIndex = document.cookie.length
  }
  return unescape(document.cookie.substring(cookieStartIndex+prefix.length,cookieEndIndex))
}
function deleteCookie(name, path, domain) 
{
 if(getCookie(name)) 
 {
   document.cookie = name + "=" + 
   ((path) ? "; path=" + path : "") +
   ((domain) ? "; domain=" + domain : "") +
   "; expires=Thu, 01-Jan-70 00:00:01 GMT"
 }
}
function fixDate(date) 
{
  var base=new Date(0)
  var skew=base.getTime()
  if(skew>0)
  {
 date.setTime(date.getTime()-skew)
  }              
}
var now=new Date()
fixDate(now)
now.setTime(now.getTime()+365 * 24 * 60 * 60 * 1000)
var visits = getCookie("counter")
if(!visits)
{
  visits=1;
}       
else
{
  visits=parseInt(visits)+1;
}     
setCookie("counter", visits, now)
document.write("您是到访的第" + visits + "位用户！")
</script>