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2 column layout - smooth resize

Posted on 2004-08-19
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786 Views
Last Modified: 2008-01-09
hello all!

Please see my code below and tell me why when you shrink the page horizontally, sometimes the blog div shifts down, and sometimes it doesnt.  what do i need to add to my css to make it resize smoothly?  thanks a bunch!

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<title>Untitled</title>

<style type="text/css">
<!--

body {
      background-color: #003366;
      margin: 0px;
      font-size: 8pt;
      font-family: georgia, verdana;
      }

.main {
      width: 90%;
      height: 100%;
      background-color: #003366;
      }
      
.header {
      color: #003366;
      width: 100%;
      height: 20%;
      background-color: #00ffff;       
      padding: 5px;
      }
      
.menu {
      color: #ffffff;
      width: 25%;
      height: 100px;
      background-color: #003366;
      float: left;
      padding: 5px;
      }
      
.blog {
      color: #ffffff;
      width: 75%;
      height: 100%;
      background-color: #3399cc;
      float: right;
      padding: 5px;
      text-align: center;
      }
      
.blogtitle {
      font-size: 12pt;
      font-weight: bold;
      }
      
.blogheader {
      width: 90%;
      background-color: #003366;
      margin-bottom: 5px;
      }      
      
.blogcontent {
      width: 90%;
      background-color: #003366;
      }

-->
</style>

</head>
<body>

<div class="main">
      <div class="header">
            Header
      </div>
      <div class="menu">
            Menu
      </div>
      <div class="blog">
            <div class="blogheader">
                  <div class="blogtitle">Title</div>
            </div>
            <div class="blogcontent">
                  Content
            </div>            
      </div>
</div>

</body>
</html>
0
Comment
Question by:flow79
  • 3
  • 2
5 Comments
 
LVL 53

Accepted Solution

by:
COBOLdinosaur earned 500 total points
ID: 11846424
Anytime you use height:100% you are basically saying to the browser "guess what size I want this to be".  What is 100% of the height of the body... all the content of the page... but the height of the content is not known because it is defined as 100% of the body whose height cannot be determined without knowing the content height. So rather then hanging on an unresolvable recusive calculation.  The browser just arbitrarily renders the page. I will get it close off the load most of the time, but re-size is a crap shoot, because the dom gets really messed.

You need to re-think what you are trying to do with this, anchor it with some specific height values, or leave the height out altogether and do whatever setting of height you need to do with script.

Cd&
0
 
LVL 13

Author Comment

by:flow79
ID: 11851433
C&d,
  I've removed all of the height: 100% values. However, I still have the .header, and .blogheader set with absolute height values - the page still breaks when its resized horizontally.  any more ideas?
0
 
LVL 53

Expert Comment

by:COBOLdinosaur
ID: 11864442
I need to see the new code or a link to the page.

Cd&
0
 
LVL 13

Author Comment

by:flow79
ID: 11869787
I actually just recoded it without heights, and it seems to work fine.

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>
<head>
<title>2 column layout with divs</title>
<style type="text/css">
<!--
body { background-color: #ffffcc; }
.main {
      width: 800px;
      background-color: #003366;
      }
.header {
      width: 800px;
      height: 75px;
      background-color: #3399cc;
      padding: 10px;
      }
.left {
      width: 50%;
      background-color: #0000ff;
      float: left;
      margin-bottom: 20px;
      padding: 10px;
      }
.right {
      width: 50%;
      background-color: #ffffff;
      float: right;
      margin-bottom: 20px;
      padding: 10px;
      }
-->
</style>
</head>
<body>
<div class="main">
      <div class="header">
      Header
      </div>
      <div class="left">
      left
      </div>
      <div class="right">
      right
      </div>
</div>
</body>
</html>


Thanks C&d for letting me know about the height issue.

you get the points!
0
 
LVL 53

Expert Comment

by:COBOLdinosaur
ID: 11870124
Yeah with CSS sometimes less is better.  The browser will try to optimize but if you restrict it too much it gets jammed.  Of course we blame the browser or the CSS when that happens, but 99% of problems on a page are developer error; we just need to work with the tchnologies.  Glad I could help.  Thanks for the A. :^)

Cd&
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