odd fields being added to URL after form submit

So I added the following code to whos_online.php:

zen_draw_form('refreshing', FILENAME_WHOS_ONLINE, '', 'get') . 
  'Refresh every' .
  zen_draw_hidden_field('info', $_GET['info']) .
  zen_draw_input_field('refresh','','size="1"') .
  ' seconds. ' . zen_image_submit('button_go.gif', IMAGE_GO) . '</form><br>' .

every time you press go (submit) it works exactly as it should... but it adds &x=0&y=0 to the end of the URL. so my URL looks like:

whos_online.php?info=frtsopl4sjavriultfhi57su57&refresh=20&x=0&y=0

where is the &x=0&y=0 coming from? it doesnt seem to bother the site, but its bothering my brain! LOL

x & y are added because you're doing an "image submit". It's a PHP thing, not a Zen Cart thing. The x and y are the coordinates where the mouse clicked on the image in order to trigger the submit. They're coming in as 0 because the mouse isn't being used due to your javascript automation.

if thats the case then why doesn't that happen on ALL zencart forms? they all use image submit.

It does, but Zen Cart ignores it.

Is there a particular problem that it's causing for you?

no... its just annoying and doesnt make much sense to me... its on a zen cart page using zen cart form functions... so why does it ignore it everywhere else but not here? am I missing something in the above code?