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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+
+ <head>
+
+  <title>CSS Writing Modes Test: 'background-position: left bottom' and 'vertical-rl' when document root element does not fill viewport width</title>
+
+  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
+  <link rel="help" href="http://www.w3.org/TR/css-writing-modes-3/#physical-only" title="7.6 Purely Physical Mappings" />
+  <link rel="match" href="background-position-vrl-018-ref.xht" />
+
+  <meta content="image" name="flags" />
+  <meta content="This test checks that 'background-position: left bottom' will make background-image start at left side of document root element (even in case there is resizing of the window) because background properties should not be affected by vertical writing-mode." name="assert" />
+
+  <style type="text/css"><![CDATA[
+  html
+    {
+      background-image: url("support/100x100-red.png");
+      background-position: left bottom;
+      background-repeat: repeat-y;
+      width: auto; /* Very important: we intentionally want the
+      document root element to not fill the viewport width */
+      writing-mode: vertical-rl;
+    }
+
+  div#reference-overlapping-green
+    {
+      background-color: green;
+      height: 100%;
+      position: absolute;
+      right: 273px;
+      /*
+        8px : body's margin-right
+    +
+      357px : pass-cdts-background-position.png's image width
+    +
+        8px : body's margin-left
+    -
+      100px : background-image width (100x100-red.png)
+    ==========
+      273px is
+      */
+      top: 0px;
+      width: 100px;
+    }
+
+    /*
+    This test requires a viewport width of at least (strict minimum) of 473px !
+    */
+  ]]></style>
+ </head>
+
+ <body>
+
+  <div><img src="support/pass-cdts-bg-pos-vrl-018.png" width="357" height="17" alt="Image download support must be enabled" /></div>
+
+<!--
+  The image says:
+
+  Test passes if there is a <strong>no red</strong>.
+-->
+
+  <div id="reference-overlapping-green"></div>
+
+ </body>
+</html>