유령로그

    var Cookies = {};
    Cookies.set = function(name, value){
         var argv = arguments;
         var argc = arguments.length;
         var expires = (argc > 2) ? argv[2] : null;
         var path = (argc > 3) ? argv[3] : '/';
         var domain = (argc > 4) ? argv[4] : null;
         var secure = (argc > 5) ? argv[5] : false;
         document.cookie = name + "=" + escape (value) +
           ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +
           ((path == null) ? "" : ("; path=" + path)) +
           ((domain == null) ? "" : ("; domain=" + domain)) +
           ((secure == true) ? "; secure" : "");
         
    };

    Cookies.get = function(name){
     var arg = name + "=";
     var alen = arg.length;
     var clen = document.cookie.length;
     var i = 0;
     var j = 0;
     while(i < clen){
      j = i + alen;
      if (document.cookie.substring(i, j) == arg)
       return Cookies.getCookieVal(j);
      i = document.cookie.indexOf(" ", i) + 1;
      if(i == 0)
       break;
     }
     return null;
    };

    Cookies.clear = function(name) {
      if(Cookies.get(name)){
      	var today = new Date();
      	today.setFullYear(today.getFullYear()-1);
        Cookies.set(name, "", today);
      }
    };

    Cookies.getCookieVal = function(offset){
       var endstr = document.cookie.indexOf(";", offset);
       if(endstr == -1){
           endstr = document.cookie.length;
       }
       return unescape(document.cookie.substring(offset, endstr));
    };