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pwdAdmin = 'PASSWORD IN PLAIN TEXT';
pwdSupport = 'support';
pwdUser = 'user';

function btnApply() {
   var loc = 'password.cgi?';

   with ( document.forms[0] ) {
      var idx = userName.selectedIndex;
      switch ( idx ) {
         case 0:
            alert("No username is selected.");
            return;
         case 1:
            if ( pwdOld.value == pwdAdmin )
               break;
            else {
               alert("Old admin password is wrong.");
               return;
            }
         case 2:
            if ( pwdOld.value == pwdSupport )
               break;
            else {
               alert("Old support password is wrong.");
               return;
            }
         case 3:
            if ( pwdOld.value == pwdUser )
               break;
            else {
               alert("Old user password is wrong.");
               return;
            }
      }

      if ( pwdNew.value != pwdCfm.value ) {
         alert("The passwords do not match.");
         return;
      }

      var str = new String();
      str = pwdNew.value;
      if ( str.length > 16 ) {
         alert('Password should not be longer than 16 characters.');
         return;
      }
      if ( str.indexOf(' ') != -1 ) {
         alert('Password cannot contain a space.');
         return;
      }

      switch ( idx ) {
         case 2:
            loc += 'sptPassword=' + encodeUrl(pwdNew.value);
            break;
         case 3:
            loc += 'usrPassword=' + encodeUrl(pwdNew.value);
            break;
         default:
            loc += 'adminPassword=' + encodeUrl(pwdNew.value);
            break;
      }

      var code = 'location="' + loc + '"';
      eval(code);
   }
}