NEW CODE (2 forms, one for each function)

index.htm has enterURLdiv which is used for both upload and URL.

<div id="uploadOrURLdiv" >

	"Upload a PDB file" link calls showUploadSlot() which writes into uploadOrURLdiv
		<form name='uploadform' id='uploadform' method='post'
		  enctype='multipart/form-data' action='https://proteopedia.org/cgi-bin/fgij'>
		<input type/name/id='file' 
		<input type='submit' ...>
		</form>

	"molecule's URL" link calls showURLSlot() which writes into uploadOrURLdiv
		<form name="urlform" id="urlform" onSubmit="submitURL(); return false;">
		<input name/id='url2get' ...>
		button labeled "Submit" does submitURL()
		</form>

----------------------------
OLD CODE FG3.8 (A SINGLE FORM WAS OUTSIDE THE DIV)
index.htm:

<form name/id="upload" onsubmit="submitURL()" ...>
	The onsubmit was unnecessary when the URL submission button is clicked because
		it calls submitURL() directly. But it is necessary for Enter to work.
	This had action='https://proteopedia.org/cgi-bin/fgij'
	Removing the action made pressing Enter work to show a URL, but killed uploading.
	Restoring the action fixed uploading, but leaves a JS error since url2get does not exist.
	Also, restoring the action causes URL slot Enter to go to the funny page at Jaim's cgi.

	Proposed solution:
		1. Put forms INSIDE the enterURLdiv.
		2. Have 2 forms, one for each function.

<div id="enterURLdiv" >

	"Upload a PDB file" link calls showUploadSlot() writing into enterURLdiv
		<input type/name/id='file' ...>
		<input type='submit' ...>

	"molecule's URL" link calls showURLSlot()
		<input name/id='url2get' ...>
		button labeled "Submit" does submitURL()

</div>
</form>