Rails - Aug 2005 - Getting value of select when using remote function

I have a select that uses remote_function (AJAX), but I am
having trouble getting the value of the selected item back.

The code is pretty simple:

    <%=select("tech", "tech_id", ["opt1",
"opt2"],
      {:prompt=>true},
      {''onchange''=> remote_function(
        :update => ''select_div'',
          :url => { 
            :action=> ''select_group'', 
            :with => "''id='' + this.value"
          }
      )
    })%>    

I have made several attempts at defining :with, but
nothing returns a value or id of the selection.
For example, the above just returns: "''id='' +
this.value"

TIA
-- 
Jim Freeze