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Editorial Team
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Asked: 2026-06-12T10:10:15+00:00

To make the issue easier to analyze I have created this jsFiddle : Code:

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To make the issue easier to analyze I have created this jsFiddle:

Code:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <style>
        body {margin:0; }
        #mainContainer { position: absolute; right: 4%; left: 4%; height: 100%; }
        #headerContainer { width: 100%; z-index: 10; position: absolute; background: #323232; color: white; height: 30px; }
        #middleContainer { height: 100%; }
        #leftSection { position: absolute; float: left; width: 175px; background: #71ABD1; height: 100%; overflow: auto; color: black; padding-top: 30px; }
        #middleSection { position: absolute; height: 100%; background-color: yellow; left: 175px; right: 175px; color: black; padding-top: 30px; }
        #rightSection { float: right; height: 100%; width: 175px; border-left: 1px dotted black; background: red; color: black; padding-top: 30px; }
        #footerContainer { position: absolute; bottom: 0; width: 100%; height: 30px; background: #323232; color: white; }
    </style>
</head>
<body>
    <div id="mainContainer">
        <div id="headerContainer">
            headerContainer
        </div>
        <div id="middleContainer">
            <div id="leftSection">
                leftSection
            </div>
            <div id="middleSection">
                middleSection
            </div>
            <div id="rightSection">
                rightSection
            </div>
        </div>
        <div id="footerContainer">
            footerContainer
        </div>
    </div>
</body>
</html>

With the markup of top, middle, and bottom sections, problem is:

1- As you can see the footer colored in black is not really on the bottom of the page despite having position:absolute and bottom:0px on the footer div

2- More importantly, leftSection, middleSection and rightSection DIVs overlap with the header and footer DIVs, in fact, in this fiddle the only way to see the text displayed of the 3 middle sections is to have padding placed to avoid having it displayed underneath the header DIV.

I have tried placing top and bottom values of 30px on middleContainer to fix the overlap issue but this does not solve the problem, all I want is to keep headerContainer on top and footerContainer on the bottom while all the 3 middle sections adjust to 100% height. leftSection and rightSection have fixed width, but middleSection has flexible width and height.

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1 Answer

  1. Editorial Team

    http://jsfiddle.net/grc4/XTQuT/2/ does what I wanted exactly without specifying solid height values.

        <!DOCTYPE html>
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
      <style>
    body {
    margin: 0;
    height:100%;
    }
#mainContainer {
    position: absolute;
    right: 4%;
    left: 4%;
    height: 100%;
}
#headerContainer {
    width: 100%;
    position: relative;
    background: #323232;
    color: white;
    height: 30px;
}
#middleContainer {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    margin: 30px 0;
}
#leftSection {
    float: left;
    width: 175px;
    background: #71ABD1;
    height: 100%;
    overflow: auto;
    color: black;
}
#middleSection {
    position: absolute;
    background-color: yellow;
    left: 175px;
    right: 175px;
    top: 0;
    bottom: 0;
    color: black;
}
#rightSection {
    float: right;
    height: 100%;
    width: 175px;
    border-left: 1px dotted black;
    background: red;
    color: black;
}
#footerContainer {
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 30px;
    background: #323232;
    color: white;
}​
</style>
    </head>
    <body>
        <div id="mainContainer">
            <div id="headerContainer">
                headerContainer
            </div>
            <div id="middleContainer">
                <div id="leftSection">
                    <div style="margin-top: 30px;">leftSection</div>
                </div>
                <div id="middleSection">
                    <div style="margin-top: 30px;">middleSection</div>
                </div>
                <div id="rightSection">
                    <div style="margin-top: 30px;">rightSection</div>
                </div>
            </div>
            <div id="footerContainer">
                footerContainer
            </div>
        </div>
    </body>
    </html>
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