diff --git a/fhem/CHANGED b/fhem/CHANGED
index 71db21948..8d4dc4f01 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -324,4 +324,6 @@
 - ==DATE== (4.1)
   - doc:     linux.html (private udev-rules, not 50-..., ATTRS)
   - bugfix:  setting devices with "-" in their name did not work
-  - doc: fhem.pl and commandref.html (notifyon -> notify, correction of examples)
+  - doc:     fhem.pl and commandref.html (notifyon -> notify, correction of examples)
+  - feature: modify command added
+  - feature: The "-" in the name is not allowed any more
diff --git a/fhem/FHEM/90_at.pm b/fhem/FHEM/90_at.pm
index 4c88cacaf..e88dd1d30 100755
--- a/fhem/FHEM/90_at.pm
+++ b/fhem/FHEM/90_at.pm
@@ -25,7 +25,14 @@ at_Define($$)
   my ($hash, $def) = @_;
   my ($name, undef, $tm, $command) = split("[ \t]+", $def, 4);
 
-  return "Usage: define <name> at <timespec> <command>" if(!$command);
+  if(!$command) {
+    if($hash->{CMD}) {
+      $command = $hash->{CMD};  # Called from modify
+      $hash->{DEF} = "$tm $command";
+    } else {
+      return "Usage: define <name> at <timespec> <command>";
+    }
+  }
   return "Wrong timespec, use \"[+][*[{count}]]<time or func>\""
                                         if($tm !~ m/^(\+)?(\*({\d+})?)?(.*)$/);
   my ($rel, $rep, $cnt, $tspec) = ($1, $2, $3, $4);
diff --git a/fhem/FHEM/91_notify.pm b/fhem/FHEM/91_notify.pm
index 30b34b473..d9a34ae97 100755
--- a/fhem/FHEM/91_notify.pm
+++ b/fhem/FHEM/91_notify.pm
@@ -25,6 +25,14 @@ notify_Define($$)
   my ($hash, $def) = @_;
   my ($type, $name, $re, $command) = split("[ \t]+", $def, 4);
   
+  if(!$command) {
+    if($hash->{CMD}) {
+      $command = $hash->{CMD};  # Called from modify
+      $hash->{DEF} = "$re $command";
+    } else {
+      return "Usage: define <name> notify <regexp> <command>";
+    }
+  }
   # Checking for misleading regexps
   eval { "Hallo" =~ m/^$re$/ };
   return "Bad regexp: $@" if($@);
diff --git a/fhem/HISTORY b/fhem/HISTORY
index 7e5be8830..c77b9cf82 100644
--- a/fhem/HISTORY
+++ b/fhem/HISTORY
@@ -87,3 +87,10 @@
 
 - Pest, Sun Apr 15 14:54:30 MEST 2007
   - doc: fhem.pl and commandref.html (notifyon -> notify, correction of examples)
+
+- Rudi, Tue Apr 24 08:10:43 MEST 2007
+  - feature: modify command added. It helps change e.g. only the time component
+    for an at command, without deleting and creating it again and then
+    reapplying all the attributes.
+  - feature: the "-" character is disallowed in defined names. Use dot (.) or _
+    instead.  The - is used to separate ranges in the set command.
diff --git a/fhem/docs/commandref.html b/fhem/docs/commandref.html
index 67ee9c727..c04a3d303 100644
--- a/fhem/docs/commandref.html
+++ b/fhem/docs/commandref.html
@@ -10,6 +10,32 @@
 
 <h2>fhem.pl command reference</h2>
 
+<a href="#intro">Introduction</a><br>
+<a href="#help">?,help</a><br>
+<a href="#attr">attr</a><br>
+<a href="#defattr">defattr</a><br>
+<a href="#define">define</a><br>
+<a href="#delattr">delattr</a><br>
+<a href="#delete">delete</a><br>
+<a href="#get">get</a><br>
+<a href="#include">include</a><br>
+<a href="#inform">inform</a><br>
+<a href="#list">list</a><br>
+<a href="#modify">modify</a><br>
+<a href="#quit">quit</a><br>
+<a href="#reload">reload</a><br>
+<a href="#rereadcfg">rereadcfg</a><br>
+<a href="#save">save</a><br>
+<a href="#set">set</a><br>
+<a href="#setstate">setstate</a><br>
+<a href="#shutdown">shutdown</a><br>
+<a href="#trigger">trigger</a><br>
+<a href="#sleep">sleep</a><br>
+<a href="#xmllist">xmllist</a><br>
+<a href="#perl">Perl specials</a><br>
+
+<a name="intro"></a>
+<h3>Introduction</h3>
 You can use all of the following commands in in two ways:
 <ul>
 <li>In the configuration file, which must be specified if you startup the
@@ -957,13 +983,33 @@ split in multiple lines<br><br>
 </ul>
 
 
+<a name="modify"></a>
+<h3>modify</h3>
+<ul>
+  <code>modify &lt;name&gt; &lt;type-dependent-options&gt;</code>
+  <br><br>
+  
+  Used to modify some definitions. Useful for changing some <a
+  href="#at">at</a> or <a href="#notify">notify</a> definitions.  If specifying
+  one argument to an at type deinition, only the time part will be changed. In
+  case of a notify type definition, only the regex part will be changed.  All
+  other values (state, attributes, etc) will remain intact.
+  <br><br>
+  Example:
+  <ul>
+    <code>define lampon at 19:00 set lamp on</code><br>
+    <code>modify lampon *19:00</code><br>
+    <code>modify lampon 19:00 set lamp on-for-timer 16</code><br>
+  </ul>
+</ul>
+
 <a name="quit"></a>
 <h3>quit</h3>
 <ul>
   <code>quit</code>
   <br><br>
   If used in a TCP/IP session, terminate the client session.<br>
-  If used in a script, terminate the parsing of the script.
+  If used in a script, terminate the parsing of the current script.
   <br><br>
   Example:
   <ul>
diff --git a/fhem/docs/fhem.html b/fhem/docs/fhem.html
index b84400f6b..c3cdcca06 100644
--- a/fhem/docs/fhem.html
+++ b/fhem/docs/fhem.html
@@ -111,7 +111,7 @@ description and <a href="faq.html">faq.html</a> for the F.A.Q.
   See <a href="http://www.koeniglich.de/fhem/linux.html">
   	http://www.koeniglich.de/fhem/linux.html</a><br>
   For kernels older then 2.6.x apply the patch from the doc directory to your
-  kernel, recompile it kernel and reboot or load/reload the ftdi_sio module.
+  kernel, recompile it and reboot or load/reload the ftdi_sio module.
 </ul>
 
 <h3>Perl modules</h3>
@@ -140,7 +140,6 @@ description and <a href="faq.html">faq.html</a> for the F.A.Q.
       parameters.</li>
   <li>Delete the savefile if you are upgrading from an older version.</li>
   <li>Start the server with <code>fhem.pl &lt;configfile&gt;</code></li>
-  <li>For using the WS300, look into the contrib/ws300 directory.</li>
 </ul>
 
 <h3>General Notes for Webfrontends:</h3>
diff --git a/fhem/fhem.pl b/fhem/fhem.pl
index a0595f418..a2ebeae90 100755
--- a/fhem/fhem.pl
+++ b/fhem/fhem.pl
@@ -73,6 +73,7 @@ sub CommandHelp($$);
 sub CommandInclude($$);
 sub CommandInform($$);
 sub CommandList($$);
+sub CommandModify($$);
 sub CommandRereadCfg($$);
 sub CommandRename($$);
 sub CommandQuit($$);
@@ -165,6 +166,8 @@ my %cmds = (
 	    Hlp=>"{on|off},echo all commands and events to this client" },
   "list"    => { Fn=>"CommandList",
 	    Hlp=>"[device],list definitions and status info" },
+  "modify"  => { Fn=>"CommandModify",
+	    Hlp=>"device <options>,modify the definition (e.g. at, notify)" },
   "quit"    => { Fn=>"CommandQuit",
 	    Hlp=>",end the client session" },
   "reload"  => { Fn=>"CommandReload",
@@ -884,8 +887,8 @@ CommandDefine($$)
   }
 
   return "$a[0] already defined, delete it first" if(defined($defs{$a[0]}));
-  return "Invalid characters in name (not A-Za-z0-9.:-): $a[0]"
-                        if($a[0] !~ m/^[a-z0-9.:_-]*$/i);
+  return "Invalid characters in name (not A-Za-z0-9.:_): $a[0]"
+                        if($a[0] !~ m/^[a-z0-9.:_]*$/i);
 
   my %hash;
 
@@ -910,6 +913,27 @@ CommandDefine($$)
   return $ret;
 }
 
+#####################################
+sub
+CommandModify($$)
+{
+  my ($cl, $def) = @_;
+  my @a = split("[ \t]+", $def, 2);
+
+  return "Usage: modify <name> <type dependent arguments>"
+  					if(int(@a) < 2);
+
+  # Return a list of modules
+  return "Define $a[0] first" if(!defined($defs{$a[0]}));
+  my $hash = $defs{$a[0]};
+
+  my $odef = $hash->{DEF};
+  $hash->{DEF} = $a[1];
+  my $ret = CallFn($a[0], "DefFn", $hash, "$a[0] $hash->{TYPE} $a[1]");
+  $hash->{DEF} = $odef if($ret);
+  return $ret;
+}
+
 #############
 # internal
 sub
diff --git a/fhem/test/fhem.save b/fhem/test/fhem.save
index a62490934..374666347 100644
--- a/fhem/test/fhem.save
+++ b/fhem/test/fhem.save
@@ -1,12 +1,13 @@
-#Sun Apr 15 13:56:14 2007
+#Sun Apr 22 14:04:14 2007
 setstate FHZ fhtbuf: 1c
 setstate FHZ 2006-02-12 14:03:39 fhtbuf 23
 setstate FHZ 2006-03-26 08:47:36 init2 deadbeefdeadbe
 setstate FHZ 2006-03-26 08:47:36 serial deadbeef
+setstate blink Next: 14:04:17
 setstate btn4 on
 setstate btn4 2006-04-12 15:19:33 state on
-setstate cellar on
-setstate cellar 2007-04-15 13:53:21 state on
+setstate cellar on-for-timer 2
+setstate cellar 2007-04-22 14:04:12 state on-for-timer 2
 setstate fl measured-temp: 21.6 (Celsius)
 setstate fl 2006-03-29 23:02:30 actuator 00%
 setstate fl 2006-03-26 08:50:54 day-temp 21.5 (Celsius)
@@ -32,11 +33,7 @@ setstate fl 2006-03-26 08:50:55 unknown_85 4
 setstate fl 2006-03-26 08:50:46 wed-from1 06:00
 setstate fl 2006-03-26 08:50:46 wed-to1 23:00
 setstate fl 2006-03-26 08:50:55 windowopen-temp 12.0 (Celsius)
-setstate floor-lamp on
-setstate floor-lamp 2006-03-29 12:05:34 state on
 setstate global <no definition>
-setstate living-light on
-setstate living-light 2007-04-15 13:54:48 state on
 setstate marqee on
 setstate marqee 2006-04-01 12:46:02 state on
 setstate n_btn4 active
@@ -45,8 +42,6 @@ setstate tf1 2006-04-11 09:48:48 battery Bat: ok
 setstate tf1 2006-04-11 09:48:48 humidity 31.3 (%)
 setstate tf1 2006-04-11 09:48:48 temperature 20.3 (Celsius)
 setstate tf1 2006-04-11 09:48:48 type HMS100TF
-setstate window-lamp on
-setstate window-lamp 2006-03-29 12:05:34 state on
 setstate wz measured-temp: 22.4 (Celsius)
 setstate wz 2006-03-29 23:04:17 actuator 00%
 setstate wz 2006-03-26 08:52:30 day-temp 22.0 (Celsius)