Checkboxes that keep their value after a refresh

Hi
I am trying to work with Checkboxes in an HTML region which will make another region appear or disappear when they are checked or unchecked. As I understand it I need to submit the page to make regions appear or disappear - but when I do this by default the checkbox forgets its value.
My checkbox is based on the static love: STATIC2:;Y which should make it ticked when the value is 'Y' and unticked when it is 'N'. I have set its default value to Y.
I have read online about how to make a checkbox remember its value by putting a computation on it that will set the value of the checkbox to 'N' when it is null. Unfortunately when I refresh the page - if the checkbox is ticked then everything is fine (as it was before) - but if it is unticked then I suddenly get two checkboxes - both of which are ticked and one of which has an 'N' after it.
Does anyone have any idea what I'm doing wrong? It's driving me mad trying to achieve something that that I'd expect to just work without any effort.
I am using Apex 4.1.1.00.23
Thanks
Dan

user5476823 wrote:
HiWelcome to the forum: please read the FAQ and forum sticky threads (if you haven't done so already)), and update your forum profile with a real handle instead of "user5476823".
When you have a problem you'll get a faster, more effective response by including as much relevant information as possible upfront. This should include:
<li>Full APEX version
<li>Full DB/version/edition/host OS
<li>Web server architecture (EPG, OHS or APEX listener/host OS)
<li>Browser(s) and version(s) used
<li>Theme
<li>Template(s)
<li>Region/item type(s) (making particular distinction as to whether a "report" is a standard report, an interactive report, or in fact an "updateable report" (i.e. a tabular form)
With APEX we're also fortunate to have a great resource in apex.oracle.com where we can reproduce and share problems. Reproducing things there is the best way to troubleshoot most issues, especially those relating to layout and visual formatting. If you expect a detailed answer then it's appropriate for you to take on a significant part of the effort by getting as far as possible with an example of the problem on apex.oracle.com before asking for assistance with specific issues, which we can then see at first hand.
I am trying to work with Checkboxes in an HTML region which will make another region appear or disappear when they are checked or unchecked. As I understand it I need to submit the page to make regions appear or disappear - but when I do this by default the checkbox forgets its value.
My checkbox is based on the static love: STATIC2:;Y which should make it ticked when the value is 'Y' and unticked when it is 'N'. I have set its default value to Y.
I have read online about how to make a checkbox remember its value by putting a computation on it that will set the value of the checkbox to 'N' when it is null. Unfortunately when I refresh the page - if the checkbox is ticked then everything is fine (as it was before) - but if it is unticked then I suddenly get two checkboxes - both of which are ticked and one of which has an 'N' after it.
Does anyone have any idea what I'm doing wrong? It's driving me mad trying to achieve something that that I'd expect to just work without any effort.Don't set the checkbox value to "N". Leave the default as null, and check that the value is "Y" or null as necessary.
APEX checkboxes probably don't work in the way you expect: a checkbox is displayed for each value in the LOV. With the checkbox item LOV Display Extra Values property set to Yes, extra values that are not included in the LOV definition—like your "N" default—will be displayed as additional checkboxes.
See +{message:id=10738376}+ for a similar situation.

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