add anchor for condx and return

Scheme+io.html

@@ -938,8 +938,11 @@ <h2>10<u>.Advanced examples:</u><br>
         <br>
         <p><b>(subset-sum-guile&nbsp; L-init t-init)</b></p>
         <p><b>#t</b><br>
-          <br>
-        </p>
+        <br>
+       </p>
+
+<a name="condx"></a> 
+
         <p style="text-align: center;">note: in the example above condx
           is a macro that allow execution of arbitrary code between
           conditionals clauses,general syntax is:</p>
@@ -1082,8 +1085,10 @@ <h2>10<u>.Advanced examples:</u><br>
         <p style="text-align: left;">This example mix many Scheme+ Style
           and illustrate the use of <b>return </b>in a Python/C++
           style:</p>
-        <p style="text-align: left;"><br>
-        </p>
+        <p style="text-align: left;"><br></p>
+
+<a name="return"></a> 
+
         <figure class="highlight">
           <pre><code class="language-scheme" data-lang="scheme"><span class="o"></span>