Rails spinoffs - Feb 2008 - prototype 1.6.0.2 - insert - how to dynamically create parameters?

Hi! (For the first time on the list! ;) ).

I tried to create some method, that is added to all form elements, and
simply puts an error message near desired element.

I wanted the function to look like this:

JS:  --------------------------
			Form.Element.Methods.putError=function(element, msg, insertn) {
				if (!msg.length) return;
				insertn=insertn||''after'';
				msg=''<span
class="errorMsg">''+msg+''</span>'';
				var e=$(element);
				var err=e.next(".errorMsg");
				if (err!=undefinederr.remove();
				e.insert({insertn: msg});
			};
			Element.addMethods();
-----------------------------------

The method is called from ''blur'' observer (for some input
field) with
something like this inside:

                 if ($F(e)!=$F(h)) e.putError(''This is my error
message!'');

After I run the page, everything is fine, until it comes to the line

				e.insert({insertn: msg});

in my putError function... I checked it out and
insertn==''after'' and
msg==''This is my error message''.

Bu in FireBug console I get an error:

                   insert has no properties
                   http://mywebpage.address.com/script/prototype.js
                   Line 1644

More detailed info:
           insert(input#ponowhaslo.haslo, Object)prototype.js (line
1644)
           _methodized()prototype.js (line 246)
           (no name)(input#ponowhaslo.haslo, "<span
class="errorMsg">Podaj hasło (conajmniej 4
znaki)</span>",
"after")prototype.js (line 426)
           _methodized()prototype.js (line 246)
           checkHaslo(input#ponowhaslo.haslo)prototype.js (line 409)
           wrapper(blur )


When instead of insertn I use
''before''/''after''/etc. when executing
e.insert() - everything is fine. But I wanted it to be more flexible.
So I tried to use Hash, to pass it to insert(), but nothing happened:

         var h=new Hash();
         h.set(insertn, msg);
         e.insert(h);

I even tried:

        e.insert(h.toJSON());

but nothing happened too...
Also using

       Element.insert(...);

has not worked.

Finally I had to use switch/case statement with deprecated
Insertion.Before/After/Top/Bottom instead of insert(), and it works
great, but it''s deprecated...

QUESTION:

What is wrong? How should I do this, to make it work as flexible as it
should?
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