var y1 = 0;   // change the # on the left to adjuct the Y co-ordinate
var dom = false;
(document.getElementById) ? dom = true : dom = false;

function placeIt() {
  if (dom && !document.all) {
    document.getElementById("header").style.top = (window.pageYOffset + y1) + 'px';
    }
  if (document.layers) {
    document.layers["header"].top = (window.pageYOffset + y1) + 'px';
  }
  if (document.all) {
  document.all["header"].style.top = (document.documentElement.scrollTop + y1) + 'px';
  }
  //window.setTimeout("placeIt()", 100);
}

window.onscroll = placeIt;