[WEB4LIB] hiding and displaying an option element using JavaScript

[Justin Rounds]

What you're trying to do should work -- what browser and os is this 
*not* working on?
_
j


John Fitzgibbon wrote:
> Hi,
> 
> Hi,
> 
> I need to hide a number of option elements in one drop down list based
> on the user selecting an option in another drop down list.
> 
> The Javascript code I'm using is
> 
> document.getElementById('starts4').style.display='none';
> 
> where 'starts4' is the id of the option element I'm trying to hide. I
> tried using a span element within the option element and giving it an id
> of 'starts4' but to no avail.
> 
> If the element is not an option element, everything works fine. The
> element appears and reappears as required.
> 
> Using 
> 
> document.frmNameSearch.elements[4].options[1]=null
> 
> is too messy, in this case, because it changes the index numbers of the
> option elements within the options array. Several options have to vanish
> and reappear depending on what is clicked and the changing of the index
> numbers makes it difficult to keep track of everything.
> 
> If the first approach could be made to work it would save a great deal
> of typing.
> 
> Any ideas would be very welcome. 
> 
> John Fitzgibbon
> 
> Galway Public Library
> Island House
> Cathedral Square
> Galway
> Ireland
> 
> p: 00 353 91 562471
> f: 00 353 91 565039
> w: http://www.galwaylibrary.ie 
> 
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-- 
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Justin Rounds
Graphic Design and Digital Media Specialist
Digital Library Development Center
University of Chicago
1100 East 57th Street
Chicago, Illinois 60637
(773)702-4391
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