diff --git a/main/course_home/course_home.php b/main/course_home/course_home.php
index 89f6b41364..95758dd2bf 100755
--- a/main/course_home/course_home.php
+++ b/main/course_home/course_home.php
@@ -55,10 +55,12 @@ $(document).ready(function(){
     $("#thematic-show").click(function(){
         $(".btn-hide-thematic").hide();
         $(".btn-show-thematic").show(); //show using class
+        $("#pross").fadeToggle(); //Not working collapse for Chrome
     });
     $("#thematic-hide").click(function(){
         $(".btn-show-thematic").hide(); //show using class
         $(".btn-hide-thematic").show();
+        $("#pross").fadeToggle(); //Not working collapse for Chrome
     });
 });
 
diff --git a/main/inc/introductionSection.inc.php b/main/inc/introductionSection.inc.php
index c8e8968a28..c19d3c97af 100755
--- a/main/inc/introductionSection.inc.php
+++ b/main/inc/introductionSection.inc.php
@@ -268,7 +268,7 @@ if ($tool == TOOL_COURSE_HOMEPAGE && !isset($_GET['intro_cmdEdit'])) {
                                 </div>
                             </div>';
         $thematic_description_html .=
-                            '<div class="accordion-body collapse in" id="pross" style="height: auto;">
+                            '<div class="accordion-body collapse in" id="pross" style="height: auto !important;">
                                 <div class="accordion-inner">
                                     <div class="row-fluid">
                                         <div class="span4">