sc was called incorrectly

toptest.html

@@ -198,7 +198,6 @@
     <script>
         var last_known_scroll = getScrollY();
         var queueing = false;
-        //sc();
         document.addEventListener("scroll", function() {
             last_known_scroll = getScrollY();
             if (!queueing) {
@@ -210,6 +209,8 @@
             queueing = true;
         });
 
+        sc(last_known_scroll);
+
         function sc(ypos) {
 
             var wheight = window.innerHeight;