Show region on button click

Question

Hi, I want to show/hide a region when user clicks on a button.
I saw the example in "http://apex.oracle.com/pls/otn/f?p=11933:29:3342298547087148"
I created a region with static id = "REGION1"
I then created a button "Test" with button type as "Template Driven" and action as "Redirect to URL without submitting the page".
I selected the button template "BUTTON" and selected the Target as URL
In the URL Target section I have
$x_Show('REGION1');
but when I run this page, and when I click on the button Test, I get a javascript syntax error.
When I checked the call that is being made on clicking the button, I found that the call is as follows:
javascript:'redirect('$x_Show('REGION1');)'
This call indeed has syntax errors (notice the single quotes).
I am not able to solve the issue.
I read the "Advanced user guide" for APEX. The pdf also mentions the same steps to be able to call javascript function from a button. But this is not working.
What is wrong here?
Message was edited by:
Ketan

Answer 1

I made the region conditional based on the value of a hidden item. The condition I used is "when item in expression 1 is not null".
Now initially, since the hidden item is null, the region is not shown.
When I click the button, I am setting the value of the hidden item to 'yes' using javascript :
$x('HIDDEN_ITEM').value = 'yes';
But this does not work. I am guessing that even if I use an application process to set the item's value, I'll have to submit the page to display the region.
I dont want to submit the page.
I want the same functionality that Carl has shown in http://apex.oracle.com/pls/otn/f?p=11933:29:3342298547087148
except the initial condition where the regions are hidden initially.