#DivContenedor {
  position: fixed;
  *position: absolute; 
  *top: expression((80 + (ignoreMe = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop)) + 'px'); 
  *left: expression((350 + (ignoreMe2 = document.documentElement.scrollLeft ? document.documentElement.scrollLeft : document.body.scrollLeft)) + 'px');
}