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+<!DOCTYPE html>
+<html>
+  <head>
+    <title>CSS Flexible Box Test: justify-content_center</title>
+    <link rel="author" title="Intel" href="http://www.intel.com" />
+    <link rel="help" href="http://www.w3.org/TR/css-flexbox-1/#justify-content-property" />
+    <meta name="assert" content="Check if the web engine can identify the justify-content value center." />
+    <style>
+      #test01, #test02, #test03{
+        text-align:center;
+        font-size: 20px;
+	width: 30px;
+      }
+      #test01{
+        background: #7FFF00;
+      }
+      #test02{
+        background: #00FFFF;
+      }
+      #test03{
+        background: #4169E1;
+      }
+      #test{
+        background: #ff0000;
+	height: 200px;
+  	width: 200px;
+        display: flex;
+	justify-content: center;
+      }
+    </style>
+  </head>
+  <body>
+    <p>Test passes if:<br>
+    1. the rectangle 1, 2, 3 show up in a row in a red rectangle and no gap between them.<br>
+    2. the rectangle 1, 2, 3 appear in middle of red rectangle.<br>
+    3. equal amounts of empty space between the left edge of the red rectangle and ractangle 1 and between the right edge of the red rectangle and rectangle 3.<br>
+    4. the height of the 1, 2, 3 is the same as the height of the red rectangle.</p>
+    <div id=test><div id=test01>1</div><div id=test02>2</div><div id=test03>3</div></div>
+  </body>
+</html>