/**
 * [setCookie 設(shè)置cookie]
 * @param {[type]} name  [名字]
 * @param {[type]} value [值]
 * @param {[type]} day   [過(guò)期時(shí)間]
 */
function setCookie(name , value , day){
 var oDate = new Date();

 oDate.setDate(oDate.getDate() + day); // 設(shè)置過(guò)期時(shí)間

 document.cookie = name + '=' + value + ';expires=' + oDate;

}

/**
 * [getCookie 獲取cookie]
 * @param  {[type]} name [名字]
 * @return {[type]}      [返回值無(wú)則返回空]
 */
function getCookie(name){
 var arr = document.cookie.split('; ');
 var i = 0;
 for(;i < arr.length;i++){
  var arr2 = arr[i].split('=');
  if (arr2[0] == name) {
   return arr2[1];
  }
 }
 return '';
}

/**
 * [removeCookie 刪除cookie]
 * @param  {[type]} name [名字]
 */
function removeCookie(name){
 setCookie(name,'',-1);
}

firefox支持本地查看cookie，其他瀏覽器需要啟動(dòng)http服務(wù)