Update file human-practices.html

wiki/pages/human-practices.html

@@ -107,15 +107,15 @@ margin: 0 auto;
       <div onclick="goTo(document.getElementById('one'))"><span id="subtitle1"
               style="color: green;"><b>Overview</b></span></div>
 
-      <div onclick="goTo(document.getElementById('two'))"><span id="subtitle1"
+      <div onclick="goTo(document.getElementById('two'))"><span id="subtitle2"
               style="color: green;"><b>Part I</b></span></div>
 
 
-      <div onclick="goTo(document.getElementById('three'))"><span id="subtitle2"
+      <div onclick="goTo(document.getElementById('three'))"><span id="subtitle3"
               style="color: green;"><b>Part II</b></span></div>
 
 
-      <div onclick="goTo(document.getElementById('four'))"><span id="subtitle3"
+      <div onclick="goTo(document.getElementById('four'))"><span id="subtitle4"
               style="color: green;"><b>Part III</b></span></div>
     </div>
     <!--overview-->