<script>

        window.onload = function () {
            var spread1 = document.getElementById("<%=FpSpread1.ClientID %>");
            if (document.all) {
                // IE
                if (spread1.addEventListener) {
                    // IE9
                    spread1.addEventListener("Scroll", sheetScrolled, false);
                } else {
                    // Other versions of IE and IE9 quirks mode (no doctype set)
                    spread1.onScroll = sheetScrolled;
                }
            }
            else {
                // Firefox
                spread1.addEventListener("Scroll", sheetScrolled, false);
            }
            spread1.addEventListener("Scroll", sheetScrolled, false);
        }

        function sheetScrolled(event) {
            var spread2 = document.getElementById("<%=FpSpread2.ClientID %>");
                spread2.ScrollTo(event.spread.GetTopRowIndex(), event.spread.GetLeftColIndex());
        }

    </script>