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;  
}