Centering the absolute positioned navigation bar of NivoSlider? (or using the margin: 0 auto trick)?

I added Nivo Slider to my Wordpress theme.

In the demo provided with the file the nivo-ControlNav has position absolute, and it is moved to the right.

I would like to know if there is a way of centering the nivo-ControlNav (and it should even be centered in Internet Explorer)?

front-page.php开发者_如何学C:

<div id="feature">
 <div class="container">
  <div id="slider-wrapper">
   <div id="slider">
    <?php // Retrive custom post type with a custom taxonomy assigned to it
     $posts = new WP_Query('post_type=page_content&page_sections=Slider (Front Page)&order=ASC') ?>
    <?php while ( $posts->have_posts() ) : $posts->the_post(); ?>
     <?php the_content(); ?>
    <?php endwhile; ?>
    <?php wp_reset_query(); ?>
   </div>
   <div class="shadow-slider">
    <!-- Shadow at the bottom of the slider -->
   </div>
  </div>
 </div><!-- .container -->
</div><!-- #featured -->

stlye.css:

#feature {
 background: #333;
 padding: 30px 0;
 height: 400px;
}
#slider-wrapper {
 float: left;
 height: 500px;
}
#slider {
 float: left;
 border: 1px solid #DDD;
}
#slider {
 position:relative;
 background:url(images/loading.gif) no-repeat 50% 50%;
}
#slider img {
 position:absolute;
 top: 0px;
 left: 0px;
 display: none;
}
#slider a {
 border: 0;
 display: block;
}
.nivo-controlNav {
 position: absolute;
 left: 260px;
 bottom: -42px;
 width: 50%;
 left: 0;
 right: 0;
 margin: 0 auto;
}
.nivo-controlNav a {
 display: block;
 width: 22px;
 height: 22px;
 background: url(images/bullets.png) no-repeat;
 text-indent: -9999px;
 border: 0;
 margin-right: 3px;
 float: left;
}
.nivo-controlNav a.active {
 background-position: 0 -22px;
}
.nivo-directionNav a {
 display: block;
 width: 30px;
 height: 30px;
 background: url(images/arrows.png) no-repeat;
 text-indent: -9999px;
 border: 0;
}
a.nivo-nextNav {
 background-position: -30px 0;
 right: 15px;
}
a.nivo-prevNav {
 left: 15px;
}
.nivo-caption {
    text-shadow:none;
    font-family: Helvetica, Arial, sans-serif;
}

Or should I just use the float: left; margin: 0 auto; trick?

EDIT:

I decided to do this:

.nivo-controlNav {
 margin: 0 auto;
 overflow: hidden;
 width: 200px;
}

.nivo-controlNav {
 margin: 0 auto;
 overflow: hidden;
 width: 200px;
}

but the links inside the nivo-controlNav div are not centered.

Any suggestions?

---

.nivo-controlNav {
    text-align:center;
    left:0;
    right:0;
}
.nivo-controlNav a {
    display:inline-block; /* so float:none */
}

It will work on all browsers understanding inline-block property.

---

I found the solution, and it's relevant for any number of images, the only inconvenient is that you'll have to use jQuery, but I guess that won't be a problem cause Nivo already works with jQuery ^^' ... anyways ...

Based on the earlier posted css codes :

.nivo-controlNav {
    position: absolute;
    left: 50%;
}

I could come up with this javascript code, I'll explain it later :

$(document).ready(function() {
    $('#slider').nivoSlider();

    var numberImages = $('#slider img').length;
    var bulletWidth = 22;
    var margin = - ( (numberImages * bulletWidth) / 2 );
    $('.nivo-controlNav').css('margin-left', margin+'px');
});

What this basically means is that, instead of giving each slider's controlNav a random margin-left based on the number of images, we'll calculate that, and the way to do that is very simple :

1. We MOVE the left edge of our controlNav to 50% (CSS)

Next we have to know the width of the WHOLE controlNav, which contains bullets of course :

`numberImages * bulletWidth`

Divide all this by 2, and then remove it from the margin-left, this simply means : move the controlNav by half of its width to the left.

Hope it works for you :)