js读取cookie方法总结

var acookie=document.cookie.split("; ");
function getck(sname)
{//获取单个cookies
for(var i=0;i<acookie.length;i++){
var arr=acookie[i].split("=");
if(sname==arr[0]){
if(arr.length>1)
return unescape(arr[1]);
else
return "";}}
return "";
}

function getcookie(objname){//获取指定名称的cookie的值
var arrstr = document.cookie.split("; ");
for(var i = 0;i < arrstr.length;i ++){
var temp = arrstr[i].split("=");
if(temp[0] == objname) return unescape(temp[1]);
}
}

function   getcookie(cookiename){ 
var   cookiestring   =   document.cookie; 
var   start   =   cookiestring.indexof(cookiename   +   ‘= ‘); 
if   (start   ==   -1)   //   找不到 
return   null; 
start +=   cookiename.length   +   1; 
var   end   =   cookiestring.indexof( "; ",   start); 
if   (end   ==   -1)   return   unescape(cookiestring.substring(start)); 
return   unescape(cookiestring.substring(start,   end)); 
}

function readcookie(name)   
{   
  var cookievalue = "";   
  var search = name + "=";   
  if(document.cookie.length > 0)   
  {    
    offset = document.cookie.indexof(search);   
    if (offset != -1)   
    {    
      offset += search.length;   
      end = document.cookie.indexof(";", offset);   
      if (end == -1) end = document.cookie.length;   
      cookievalue = unescape(document.cookie.substring(offset, end))   
    }   
  }   
  return cookievalue;   
}