function BR_sync() {
objText = MM_findObj('SpText');
y_pos = (typeof objText.scrollTop == "number")? objText.scrollTop: objText.pageYOffset;
MM_findObj('SpBild').style.top = -y_pos;
MM_findObj('SpLink').style.top = -y_pos;
}

var aktiv = window.setInterval("BR_sync()",100);