一、建立Cookie

document.cookie = 'key=value'; 

有特殊字元 使用encodeURIComponent() 進行編碼

document.cookie = 'user='+encodeURIComponent('張三;'); 

讀取時 使用decodeURIComponent()

例如：　　

document.cookie = 'name=guoqian';
document.cookie = 'age=24';
document.cookie = 'address=hunan';
document.cookie = 'user='+encodeURIComponent('張三;'); 
 

自定義一個建立cookie方法

function SetCookie(name, value, expires, path, domain, secure) {
 var today = new Date();
 today.setTime(today.getTime());
 if(expires) { expires *= 86400000; }
 var expires_date = new Date(today.getTime() + (expires));
 document.cookie = name + "=" + escape(value)
  + (expires ? ";expires=" + expires_date.toGMTString() : "")
  + (path ? ";path=" + path : "")
  + (domain ? ";domain=" + domain : "")
  + (secure ? ";secure" : "");
}
 

二、獲取cookie

使用字串方式

function getCookieByArray(name){
 var cookies = document.cookie.split(';');
 var c;
 for(var i=0; i<cookies.length ; i++){
  c = cookies[i].split('=');
  if (c[0].replace(' ', '') == name) {
   return c[1];
  }
 }
}
var r = decodeURIComponent(getCookieByArray('user'));
alert(r);
 

使用陣列方式

function getCookieByArray(name){
 var cookies = document.cookie.split(';');
 var c;
 for(var i=0; i<cookies.length ; i++){
  c = cookies[i].split('=');
  if (c[0].replace(' ', '') == name) {
   return c[1];
  }
 }
}
var r = decodeURIComponent(getCookieByArray('user'));
alert(r);