diff --git a/heatcalc/heatcalc.js b/heatcalc/heatcalc.js
index d021260..5d7d2da 100644
--- a/heatcalc/heatcalc.js
+++ b/heatcalc/heatcalc.js
@@ -63,6 +63,12 @@ define(["jquery"], function ($) {
     };
 
     function check_scroll(){
+        //
+        $("#hc_table thead.table").find('tr').first().children().each(function(i, e){
+            $($("#hc_table thead.fixed").find('tr').children()[i]).width($(e).width());
+        });
+
+
         // make sure the left/right buttons are hidden if already at far left/right
         var sl=$("#table_container").scrollLeft();
         var sl_max = $("#hc_table").outerWidth() - $("#table_container").width();
@@ -188,12 +194,10 @@ function draw_table(){
     // display the table
     $("#table_container").append(table);
 
-    //clon the thead
+    //clone the thead
     var org_thead=$("#hc_table thead");
-    org_thead.clone().attr('id','floater').css('position','fixed').prependTo("#hc_table");
-    org_thead.find('tr').first().children().each(function(i, e){
-        $($("#hc_table thead#floater").find('tr').children()[i]).width($(e).width());
-    });
+    org_thead.clone().attr('class','fixed').css('position','fixed').prependTo("#hc_table");
+    org_thead.attr('class','table');
 
     //enable highlighting
     $("#hc_table td").on("mouseover", function() {