lundi 13 juin 2016

CSS: How do I stretch a background with a different z-index to height of page contents

So I am building a webpage and I can't find a way to dynamically stretch the background (with a different z-index) to the start of the page footer. I have searched for javascript, jquery and css approaches but no dice. Anyone know how to do this? Here is my code:

<html>
<head>
    <style>
        *
        {
            list-style: none;
            text-decoration:none;
            padding: 0;
            margin: 0;
        }
        html
        {
            margin: 0 auto;
            width: 100%;
            background: #ccc;

        }
        body 
        {
            margin: 0;
            padding: 0;

        }
        #page
        {
            width: 100%;

        }
        #grey_block_left
        {
            width: 30%;
            background-color: #333333;
            height: 100%;
            left: 0px;
            top: 0px;
            position: absolute;
            z-index: 0;
        }
        #purple_block_right
        {
            width: 70%;
            background-color: #9966cc;
            height: 100%;
            right: 0px;
            top: 0px;
            position: absolute;
            z-index: 0;
        }
        #content
        {
            width: 70%;
            margin: 0 auto;
            background-color: #fff;
            height: 1000px;
            position: relative;
            z-index: 5;
            margin-top: 150px;
            margin-bottom: 50px;
            padding: 20px;
        }
        #footer
        {
            position: relative;
            z-index: 5;
            width: 100%;
            height: 300px;
            background-color: #333;
            color: white;
        }
    </style>
</head>
<body>
    <div id="page">
        <div id="grey_block_left"></div>
        <div id="purple_block_right"></div>
        <div id="content">
            <h1>Content</h1>
        </div>
        <div id="footer">
        </div>
    </div>
</body>
</html>

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