Rails - Feb 2006 - Firefox java script error in prototype.js

Hi,

I am usign two selects, a master and a slave:

<%= select("master", "id", @master) %>
<div id="slave_id_list">
<%= select("slave", "id", @slave) %>
</div>
<%= observe_field("master[id]",
  :frequency => 0.25,
  :update => "slave_id_list",
  :url => {:action => :update_slave_select},
  :with => "''my_id=''+value")
%>

also I made:

def index
  @master = ...
  @slave= ...
end

def update_slave_select
  @slave= ....
  render(:partial => ''select'')
end

and in _select.rhtml:

<%= select("slave", "id", @slave) %>


This works fine in internet explorer, in firefox I have the following javascript
error:


Error: element has no properties
Source File: http://localhost:3000/javascripts/prototype.js
Line: 1280

and the javascript code at prototype:

Form.Element = {
  serialize: function(element) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    var parameter = Form.Element.Serializers[method](element);

    if (parameter) {
      var key = encodeURIComponent(parameter[0]);
      if (key.length == 0) return;

      if (parameter[1].constructor != Array)
        parameter[1] = [parameter[1]];

      return parameter[1].map(function(value) {
        return key + ''='' + encodeURIComponent(value);
      }).join(''&'');
    }
  },

  getValue: function(element) {
    element = $(element);
>>>>>>>>>>    var method =
element.tagName.toLowerCase();
    var parameter = Form.Element.Serializers[method](element);

    if (parameter)
      return parameter[1];
  }
}


Any sugestion for solving this?

Thanks,

Paulo Abreu

paulo@explicadores.net wrote:
> <%= observe_field("master[id]",
> ...
> This works fine in internet explorer, in firefox I have the following
javascript
> error:
> ... 
> Error: element has no properties
Try
	<%= observe_field("master_id",


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