searchform.php

<form role="search" method="get" id="searchform" action="<?php echo home_url( '/' ); ?>">
    <div><label for="s"><h4>Search</h4></label>
        <input class="nice" value="" type="text" name="s" id="s" />
        <input class="nice button radius" type="submit" id="searchsubmit" value="Search" />
    </div>
</form>