Using Javascript in a report region

Question

I have a text box that I need to populate with an amount for billing. There is also a field that shows the amount due. If the amount due is equal to the amount being paid, I want my user to click on the amount due, and it automatically populates the amount being paid. I am using the javascript:setValue('destination','origination'); command, but the problem is that I am unable to choose the text field in the javascript. I have tried using #value# aliasing, and htmldb_application.g_f0x and just f0x... nothing seems to properly alias the text box within the tabular form. Any ideas?
Thanks,
Scott

Answer 1

Scott,
I know a way to do this, but it is not an easy implementation and it is quite hard to explain. Carl is an Oracle guy so he may know of a better solution, but here is what I came up with on my own:
First let's be familiar with the htmldb_item syntax (found in the html db documentation):
HTMLDB_ITEM.TEXT(
p_idx IN NUMBER, -- unique id
p_value IN VARCHAR2 DEFAULT NULL, -- value of item
p_size IN NUMBER DEFAULT NULL, -- HTML tag attributes
p_maxlength IN NUMBER DEFAULT NULL, -- max length
p_attributes IN VARCHAR2 DEFAULT NULL, -- HTML elements including where you incorporate the javascript for this item
p_item_id IN VARCHAR2 DEFAULT NULL, -- id you can specify
p_item_label IN VARCHAR2 DEFAULT NULL) -- labe you can specify
I would create your report region using the following sql statement:
select order_number "Order Number",
name "Name",
amount_due "Amount Due",
lpad((ROW_NUMBER() OVER (ORDER BY order_number)),4,0) "Row Num",
htmldb_item.text(7,amount_paid,null,null,null,'f07_'||lpad((ROW_NUMBER() OVER (ORDER BY order_number)),4,0) "Amount Paid"
from tbl_orders
where....
order by order_number
--i had to use an order by to get the ROW_NUMBER() to work
This will create on every row an item that is specific to the row number. For example:
Row # Amount Paid text box item ID
1 f07_0001
2 f07_0002
500 f07_0500
etc.
This will allow you to reference items based on what row they are when using javascript.
Next you need to create a link out of the the amount_due column. Go to the Report Region, then the Report Attributes tab. Click on the edit link for the amount_due column. Go to the Column Link section.
Make link_text = to the value of amount_due column(#amount_due# probably)
Make the Target = URL
Make URL = javascript: setValues('#AMOUNT_DUE#','#ROW_NUM#');
This will send the value of amount due and the row number.
Here's the javascript you would put in your HTML Header on you Page Attributes:
<script language="JavaScript1.1" type="text/javascript">
function setValues(due, rownum){
document.getElementById('f07_'+rownum).value = due;
</script>
Give that a shot. I just created a page and got that to work.
Chris