cookie的设值和取值

取cookie

function getCookie(name) { //取得cookie
    var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));
    if(arr != null) {
        return unescape(arr[2]);
    }
    return null;
}

设值cookie

function setCookie(name,value) { //设置cookie
  var Days = 10; //此 cookie 将被保存 30 天
  var exp  = new Date();    //new Date("December 31, 9998");
  exp.setTime(exp.getTime() + Days*24*60*60*1000);
  if((typeof value == "string")&&(value.length > 0)){
      document.cookie = name + "="+ escape(value) + ";expires=" + exp.toGMTString();
  }else{
      var exp = new Date();
      exp.setTime(exp.getTime() - 1);
      var cval=getCookie(name);
      if(cval!=null)
          document.cookie=name +"="+cval+";expires="+exp.toGMTString();
  }
}