JavaScript的Cookies函数库

来源：互联网发布：win10卡顿如何优化编辑：程序博客网时间：2024/05/17 01:33

//   保存Cookie
function   saveCookie(name,   value,   expires,   path,   domain,   secure){
      var   strCookie   =   name   +   "="   +   value;
      if   (expires){
            //   计算Cookie的期限,   参数为天数
            var   curTime   =   new   Date();
            curTime.setTime(curTime.getTime()   +   expires*24*60*60*1000);
            strCookie   +=   ";   expires="   +   curTime.toGMTString();
      }
      //   Cookie的路径
      strCookie   +=     (path)   ?   ";   path="   +   path   :   "";
      //   Cookie的Domain
      strCookie   +=     (domain)   ?   ";   domain="   +   domain   :   "";
      //   是否需要保密传送,为一个布尔值
      strCookie   +=     (secure)   ?   ";   secure"   :   "";
      document.cookie   =   strCookie;
}
//   使用名称参数取得Cookie值,   null表示Cookie不存在
function   getCookie(name){
      var   strCookies   =   document.cookie;
      var   cookieName   =   name   +   "=";     //   Cookie名称
      var   valueBegin,   valueEnd,   value;
      //   寻找是否有此Cookie名称
      valueBegin   =   strCookies.indexOf(cookieName);
      if   (valueBegin   ==   -1)   return   null;     //   没有此Cookie
      //   取得值的结尾位置
      valueEnd   =   strCookies.indexOf(";",   valueBegin);
      if   (valueEnd   ==   -1)
              valueEnd   =   strCookies.length;     //   最後一个Cookie
      //   取得Cookie值
      value   =   strCookies.substring(valueBegin+cookieName.length,valueEnd);
      return   value;
}
//   检查Cookie是否存在
function   checkCookieExist(name){
      if   (getCookie(name))
              return   true;
      else
              return   false;
}
//   删除Cookie
function   deleteCookie(name,   path,   domain){
      var   strCookie;
      //   检查Cookie是否存在
      if   (checkCookieExist(name)){
          //   设置Cookie的期限为己过期
          strCookie   =   name   +   "=";
          strCookie   +=   (path)   ?   ";   path="   +   path   :   "";
          strCookie   +=   (domain)   ?   ";   domain="   +   domain   :   "";
          strCookie   +=   ";   expires=Thu,   01-Jan-70   00:00:01   GMT";
          document.cookie   =   strCookie;
      }
}