W3Schools Tryit Editor

<!DOCTYPE html>
<html>
<head>
<style>
body {
 background-image: url("w3css.gif");
 background-repeat: no-repeat;
 background-attachment: fixed;
}
</style>
</head>

<body>
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
The background-image is fixed. Try to scroll down the page.
If you do not see any scrollbars, try to resize the browser window.
</body>

</html>

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<!DOCTYPE html><html><head><style>body {  background-image: url("w3css.gif");  background-repeat: no-repeat;  background-attachment: fixed;}</style></head>​<body><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>The background-image is fixed. Try to scroll down the page.</p><p>If you do not see any scrollbars, try to resize the browser window.</p></body>​</html>​