How to know if a file browser item is not null using javascript fucntion

Question

Hi
<br><br>
I tried to use javascript for validation. I have a file browser item named P55_FILE_NAME and I would like to know if this item is null or not before submit.
<br>
I wrote this function :<br><br>
function validate_import(f_n){<br>
     if (trim(document.getElementByName(f_n).src) == "")<br>
     {<br>
     alert ("File name is empty.");<br>
     document.getElementByName(f_n).focus();<br>
     }<br>
     else{<br>
     doSubmit('SUBMIT');<br>
     }<br>
} <br><br>
When I press submit button I got an error, sounds like the src method does not exist in my input item. <br>
Then, I looked my source page an I found this :<br><br>
input type="file" name="p_t01" size="30"
<br><br>
there is know src method and the name is not P55_FILE_NAME and I don't want to use <b>p_t01</b> that will change.<br>
<br>
I need your help.<br>
Benn

Answer 1

Hello,
The p_txx notation is the internal name the ApEx engine attaches to each page item. It starts with p_t01 (for the first item on page) and can end with p_t99 (hence, the max 99 items per page limit). You can see these names in your HTML source code.
The bug in the File Browse item (fixed in version 2.2) is that the ID of the item is the internal name instead of the item name. Hence, in order to use DOM, you need to use this internal notation.
If the File Browse item id is p_t01, you can null its content by using something like that (V2.0 notation) :
html_GetElement('p_t01').value = '';I'm using the same, and similar code, for manipulating this type of item with no problems.
Please document the use of this workaround, as when you'll upgrade your ApEx system, you will have to change this code back to the standard – item id equal item name.
(Please follow Scott's advise, and keep your logic connected issues on the same thread. It will get you more quick and accurate help).
Regards,
Arie.