var w = window;
      function openWin1(url) {
         if ((w == window) || w.closed) {
            w = open(url,"kids","width=840,height=630,statusbar=no,scrollbars=yes,resizable=yes,toolbar=no,locationbar=no,menubar=no,personalbar=no");
         } else {
            w.focus();
            w = open(url,"kids","width=840,height=630,statusbar=no,scrollbars=yes,resizable=yes,toolbar=no,locationbar=no,menubar=no,personalbar=no");
         }
         return(false);
            }
      function openWin2(url) {
         if ((w == window) || w.closed) {
            w = open(url,"world","width=810,height=630,statusbar=no,scrollbars=no,resizable=yes,toolbar=no,locationbar=no,menubar=no,personalbar=no");
         } else {
            w.focus();
            w = open(url,"worlds","width=810,height=630,statusbar=no,scrollbars=no,resizable=yes,toolbar=no,locationbar=no,menubar=no,personalbar=no");
         }
         return(false);
            }