Placing the search box on the top mega menu

[morsagmon]

Hello.
Using Joomla 1.7.3 with JA Purity II.
I'd like to place the search box on the top mega menu.
My preference is to have it always justified to the LEFT, regardless of the number of menu entries (this is a RTL menu, so, starting from right to left).
If you can guide me on how to do this - great!
Since I couldn't find a way to do this, I will probably compromise for putting the search module as the last menu entry (no left-justified). I managed to do this by way of adding a "text separator" item, with "show title" = NO and "group" = YES. HOWEVER, In addition to the search box showing correctly on the menu, there's a thin white line added below that causes a whole stripper to be added below the menu - see attachment.
How do I get rid of this white line?

Thanks!
Mor

[khoand]

You add the code into /templates/ja_purity_ii/blocks/mainnav.php

	<?php if($this->countModules('search1')) : ?>
	<div id="ja-search1">
		<jdoc:include type="modules" name="search1" />
	</div>
	<?php endif; ?>

after

	<?php if (($jamenu = $this->loadMenu())) $jamenu->genMenu (); ?>

You add the code into /templates/ja_purity_ii/css/template.css

#ja-search1 {
position: absolute;
left: 0;
}

You set position of search menu is search1

[morsagmon]

Thank you Khoand!
We're getting there.
See in the attached, the searchbox is placed BELOW the megamenu. How do we move it up?
Thanks!
Mor

[morsagmon]

OK, solved it.
I added this to the template.css file:

top: 9px;

Thanks!

[dnasport]

Is this the same config for JA Tiris? Need to add a search module to the menu bar.