docs: added target attribute to external URLs
diff --git a/docs/opengles.html b/docs/opengles.html
index 8665a9c..a871e85 100644
--- a/docs/opengles.html
+++ b/docs/opengles.html
@@ -10,7 +10,8 @@
<p>The current version of the OpenGL ES state trackers implement OpenGL ES 1.1 and OpenGL ES 2.0.
More informations about OpenGL ES can be found at
-<a href="http://www.khronos.org/opengles/">http://www.khronos.org/opengles/</a>.</p>
+<a href="http://www.khronos.org/opengles/" target="_parent">
+http://www.khronos.org/opengles/</a>.</p>
<p>The OpenGL ES state trackers depends on the Gallium architecture and a
working EGL implementation. Please refer to <a href="egl.html">Mesa EGL</a>