Jonathan Mangin wrote:
First drop-down: <select onBlur="populate_clinicians(['src_id'],
['clin_list']); return true;" name="src_id" id="src_id"> <option
value=""> </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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