<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>CSS Test: Block-level elements generate principal block boxes with block boxes</title> <link rel="author" title="Microsoft" href="http://www.microsoft.com/"> <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/"> <!-- 2012-07-01 --> <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#block-boxes"> <link rel="match" href="reference/box-generation-001-ref.htm"> <meta name="flags" content=""> <meta name="assert" content="Block boxes can reside within a principal block box established by a block-level element; inline boxes are outside of the principal block box."> <style type="text/css"> div div { background: blue; width: 1in; } #span1 { background: orange; } #span2 { background: yellow; float: left; width: 0.5in; } </style> </head> <body> <p>Test passes if the orange stripe is below the blue stripe and the yellow stripe is on the left-hand side of the orange stripe.</p> <div id="div1"> <div>Block box</div> <span id="span1">Inline box</span> <span id="span2">Float</span> </div> </body> </html>