Thank you very much Nayem, that worked. Thanks!

It’s actually not a post. It’s actually one of the theme’s location taxonomy that I am editing. I’ve been able to create the form but editing doesn’t work.

Also I am thinking about implementing on a page template to do the Javascript:

<script>
	function showHide()
	{
		var dllarea = $("#dllarea");
		
		if(document.getElementById("dllarea").selectedIndex == 0)
		{
			document.getElementById("dlllocation").options.add("Item1");
		}
	}
</script>

Is there any way to add id to the form field or add onChange=”showHide” on the field?

I created the page called Edit Listings

Added the [wpuf_edit] into the post

Then within the User Frontend page I went to general and then modified the Edit Page to:
Edit Listings

Right now when I entered the page it shows edit listings but then what if I have different form? and how do I state that which post id it is that I am editing?