Question

2 divs at 50% width with borders = greater than 100%?

Asked by: MatthewP

I have one div which has width set to 25% (quarter of page width)

Inside this i have two divs each floated left with width set to 50%. Both divs need fit exactly into the outer div contracting as the window is contracted etc.

I want a border on one of the divs to separate them. Adding a border seems to make the div greater than 50% though. Is there a trick to getting this to work with borders and percentages so 100% of the space is used?

Thanks,
Matt

<!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" content="text/html; charset=utf-8" />
<title>Test</title>
<style type="text/css">
 
#outer_div{
width:25%; 
height:95px; 
border: 1px black solid
}
 
#inner_left{
float:left;
width:50%;
height: 100%;
display:inline;
background-color:red;
border-right: 1px black solid;
}
 
#inner_right{
float:right;
width:50%;
height:100%;
display:inline;
background-color:cyan;
}
 
</style>
</head>
 
<body>
<div id="outer_div">
<div id="inner_left">left div</div>
<div id="inner_right">right div</div>
</div>
 
</body>
</html>

                                  
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Asked On
2009-08-03 at 12:13:06ID24622542
Tags

css div width

Topic

Cascading Style Sheets (CSS)

Participating Experts
3
Points
90
Comments
6

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Answers

 

by: chilternPCPosted on 2009-08-03 at 17:16:20ID: 25009602

yep the border does add 1px too many.
on the border one...
you could try margin-righ:1px;  
or actually state the padding: 0 0 0 0;

 

by: wilson1000Posted on 2009-08-04 at 02:18:51ID: 25011718

You would be better off running a 1px x 45px (optimised) image down the right hand side of your container something like the code snippet below.

The reason this is happening is because you have already utilised 100% of the view point width, if you add padding, margins, borders ect, you will add to the already maxed-out width of the respective container, and also invoke a horizontal scroll bar.

Because percentage is a dynamic measurement, my advice is to use an image. You will therefore be in a better position to cater for a vast majority of user agents (browsers).

Let me know how your get on

Kind regards

#inner_left{
float:left;
width:50%;
height: 100%;
display:inline;
background:#c00 url("path_to_your_image.png") repeat-y right top;
}
                                              
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by: chilternPCPosted on 2009-08-04 at 07:21:29ID: 25014095

or een try a minus margin to conpensate for the border...
you could try margin-righ:-1px;  

 

by: gadzPosted on 2009-08-05 at 07:30:30ID: 25023843

what about this?

<!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" content="text/html; charset=utf-8" />
<title>Test</title>
<style type="text/css">
 
#outer_div{
width:25%; 
height:95px; 
border: 1px black solid
}
 
#inner_left{
float:left;
width:50%;
height: 100%;
display:inline;
background-color:red;
}
 
#inner_right{
float:right;
width:50%;
height:100%;
display:inline;
background-color:cyan;
}
 
#content_left {
	border-right: 1px black solid;
	min-height: 1px;
	height: 100%;
}
 
</style>
</head>
 
<body>
 
	<div id="outer_div">
		<div id="inner_left">
			<div id="content_left">left div</div>
		</div>
		<div id="inner_right">right div</div>
	</div>
 
</body>
</html>

                                              
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by: MatthewPPosted on 2009-10-28 at 04:32:12ID: 25682044

Thanks, this does actually work in firefox at least so Im going to award the points anyway. IE6 still has problems with it though, which I probably should have mentioned, needs to be fully cross browser compatible. Interesting solution for firefox anyway though.

Thanks,
Matt

 

by: MatthewPPosted on 2009-10-28 at 04:35:24ID: 31611124

worked for firefox

20120131-EE-VQP-002

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