Search form in navation bar

Hi,

I put a search form in my nav bar. It works in IE but in
firefox you can’t even type in it.

I think its my css code. Anyone have any ideas on how
to fix?

https://allfreebielinks.com

This is the what I have in my style.css file.

.nav_search {
position:absolute;
left:900px;
width:175px;
white-space:nowrap;
margin-top:10px;
}

.nav_search .search {
width:150px;
}

This what I have in header.php

<div class=”nav_search”><?php get_search_form( $echo ); ?></div>

Thank you