Re: [cgiapp] Test 2 - is this thing on?

[RA Jones <suppressed>]

Jonathan Mangin wrote:
> > First drop-down: <select onBlur="populate_clinicians(['src_id'], 
> > ['clin_list']); return true;" name="src_id" id="src_id"> <option 
> > value="">&nbsp;</option> .. </select>
>
> Looks like all the examples of using CGI::Ajax I've seen. Is 
> populate_clinicians doing a db lookup?  If so, isn't that where $html
>  should be defined?  Is it a huge list?

Yes populate_clinicians selects a sub-set from a national list of over
34,000 - far too many to load at first go. It returns a pre-formatted
drop-down menu containing all the clinicians which 'belong' to the
selected src_id (ie hospital) - a couple of hundred or so.

> I would use onChange=... since your sub will be invoked that much 
> sooner (milliseconds).

The reason I do that is a little complex, but in summary there are two
ways to arrive at the page containing the sources & clinicians drop-down
menus - one where the source/src_id combination is pre-selected, and the 
other where it is not. In the first scenario the user probably would not 
change the pre-selected source so onBlur would not be invoked, whereas 
onChange is always invoked since I force the cursor onto that field on 
page load. Hope that a bit clearer than mud!

> > Dependant drop-down generated by: <div id="clin_list"></div>
>
> In my template I have a placeholder, with instructions.
>
> <div id=doctors> <select name=doctor_id size=1 disabled> 
> <option>Select a Practice </select> </div>

So you're doing something similar? How does this work if the field is
disabled and so inaccessible?
--
Richard Jones
Leeds, UK
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