<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>CSS Test: Z-index set to zero prefixed with a plus sign</title> <link rel="author" title="Microsoft" href="http://www.microsoft.com/"> <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/"> <!-- 2012-07-03 --> <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#propdef-z-index"> <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#z-index"> <link rel="match" href="reference/ref-filled-green-100px-square.htm"> <meta name="flags" content=""> <meta name="assert" content="The property z-index set to '0' prefixed with a plus sign is read as value '0'."> <style type="text/css"> #div1 { background: red; height: 100px; left: 0; position: absolute; top: 0; width: 100px; z-index: +0; } #div2 { background: green; height: 100px; left: 0; position: absolute; top: 0; width: 100px; } #wrapper { position: relative; } </style> </head> <body> <p>Test passes if there is a filled green square and <strong>no red</strong>.</p> <div id="wrapper"> <div id="div1"></div> <div id="div2"></div> </div> </body> </html>