Javascript API $x_uptill problem

Question

Hi people,
I have a little boring problem...
Simply I made this function in order to hide & show a page element with it's label
function ApplyVisible(obj, Visible){
var lblobj = html_GetElement(obj);
labels = document.getElementsByTagName("LABEL")
for(var i = 0; i < labels.length; i++){
if(labels.getAttribute("for") == lblobj.id){
var lbl = labels[i];
break;
var td = $x_UpTill(obj, 'TD');
if ($x_UpTill(obj, 'FIELDSET'))
var fieldset = $x_UpTill(obj, 'FIELDSET');
but the function $x_UpTill raise an exception when an upper node element with FIELDSET tag does not exists
E is null
http://myhost:myport/i/javascript/apex_3_1.js
Line 1
What I'm wrong?
Thanks all
Claudio

Answer 1

Hello,
>> I don't want to hide all table row
APEX uses tables to layout items. Each item is comprised of two table cells – one for the item label, and one for the input part (element in APEX terms). So, if you want to hide a single item (label and element) on your page, which reside on a single form row, the JavaScript function I mentioned is the one to use. If you have more than one item on the form row, you’ll need different approach, depends on your exact layout. In this case, $x_UpTill() will probably not be relevant, because you’ll be looking for sibling nodes, and not parent ones.
And to your original JavaScript code. It’s very hard to debug a code without see the actual page and item layouts, so I’ll speak in general.
First, the ‘fieldset’ tag doesn’t wrap the label part of the item, only the element part, so cascading up to it, will not hide the label.
Second, the ‘label’ tag is not used with all the items, even not with all the items that wrapped with ‘fieldset’. For example, a date picker item includes ‘fieldset’ but not ‘label’. In your code, you are retrieving all the ‘label’ tags, but for many items on your page, it might return null.
If you want something more specific, you should post an example on apex.oracle.com.
Regards,
Arie.
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