function dimPage() {
        var ok = getCookie("age") == "over_25";
        if (ok) {
          document.getElementById("dim_page").style.display = "none";
          document.getElementById("age_outer").style.display = "none";
          document.getElementById("age_inner").style.display = "none";
        } else {
          var divh = document.getElementById('frame').offsetHeight;
          document.getElementById('dim_page').style.height = divh + 'px';
          document.getElementById("dim_page").style.display = "block";
          document.getElementById("age_outer").style.display = "block";
          document.getElementById("age_inner").style.display = "block";
        }
      }

      function clearFog() {
        document.getElementById('dim_page').style.display = 'none';
        document.getElementById('age_outer').style.display = 'none';
        document.getElementById('age_inner').style.display = 'none';
        currimg = 0;
        setCookie('age', 'over_25', 30, '/', '', '');
      }

      function setCookie(name, value, expires, path, domain, secure) {
        // set time, it's in milliseconds
        var today = new Date();
        today.setTime( today.getTime() );

        /*
        if the expires variable is set, make the correct
        expires time, the current script below will set
        it for x number of days, to make it for hours,
        delete * 24, for minutes, delete * 60 * 24
        */
        if ( expires )
        {
        expires = expires * 1000 * 60 * 60 * 24;
        }
        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" : "" );
      }

      function getCookie(c_name) {
        if (document.cookie.length > 0) {
          c_start = document.cookie.indexOf(c_name + "=");
          if (c_start!=-1) {
            c_start = c_start + c_name.length+1;
            c_end = document.cookie.indexOf(";",c_start);
            if (c_end==-1) c_end=document.cookie.length;
            return unescape(document.cookie.substring(c_start,c_end));
          }
        }
        return "";
      }