// preserve page scroll position
function saveScrollPositions(theForm)
{
  if(theForm) 
  {
    theForm.scrollx.value = typeof window.pageXOffset != 'undefined' ? window.pageXOffset : document.documentElement.scrollLeft; 
    theForm.scrolly.value = typeof window.pageYOffset != 'undefined' ? window.pageYOffset : document.documentElement.scrollTop; 
  }
}