problems arising from the alignment of floating divs

I am struggling with aligning the image "logo.jpg" in a left-floated div. How can I center it both vertically and horizontally within the code below? Thank you.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" />
<title>layout</title>
<style type="text/css">

body,div,ul,li,dl,dt,dd,ol,p,h1,h2,h3,h4,h5,h6,form {font-size:11px; margin:0;padding:0;line-height: 150%;}
ul,ol,dl {list-style:none}
img {border:0;vertical-align:top;}
ul {list-style:none; padding:0; margin:0;}


#_layout {margin:0 auto; width:980px;}
#_top_cntr {width:980px; height:150px; background:#fff; margin-bottom:10px;}

/* top_cntr */
#_brand {height:110px; background:url(images/top_bg.jpg);}

#_left_logo {width:280px; height:110px; float:left; padding-left:10px;}
#_right_logo {width:680px; height:110px; float:right; margin-left:10px;}

</style>
</head>
<body>
<div id="_layout">
   <div id="_top_cntr">
       <div id="_brand">
            <div id="_left_logo">
                <img src="images/logo.jpg"/>
            </div>
            <div id="_right_logo">
            </div>
       </div>
     </div>
</div>
</body>
</html>
css

Answer №1

To vertically align content, you must use vertical-align: middle. However, this property only works on elements with display: table-cell, so you will need to add it as well. Check out this example for a demonstration (I have updated the style of #_left_logo).

For other methods of vertically centering the content of your div, you can refer to this article.

Answer №2

To achieve this effect, it is usually done using CSS styling techniques.

<div id="_brand">
    <a id="_left_logo" class="img-replacement> <!-- It's a good practice to make the logo a link -->
        You can also add some text here as a fallback if the image fails to load
    </a>
    <div id="_right_logo">
    </div>
</div>

Next, in your CSS file:

.img-replacement {
    display: block;
    text-indent: -9999px;
}

#_left_logo {
    width: 280px; 
    height: 110px; 
    float: left; 
    padding-left: 10px;

    /* Add the following properties for background image */
    background: url("/images/logo.png") center center no-repeat;
}

Answer №3

To position an image at a specific height, use the position: absolute property. For instance, let's consider an image size of 200x60.

#_logo_main {width:320px; height:140px; float:left; padding-left:15px; position: relative;}

#_logo_main img {width:200px; height:60px; position: absolute; top: 50%; left: 50%; margin-top: -100px; margin-left: -30px; }

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