function set_focus(form_name, elt_name) {
  var oForm
  var oElt

  oForm = document.forms[form_name]
  if (!oForm) return

  oElt = oForm[elt_name]
  if (!oElt) return

  oElt.focus()

  return
}

function show_image(file_name, w, h, name, path) {
  var oWnd = window.open(path + "show_image.php?filename=" + file_name, name, "width=" + w + ",height=" + h)
	return
}

function enable_form(form_name, enabled) {
  var o_form
	var o_elt
	
	o_form = document.forms[form_name]
	if (!o_form) return

	for (j = 0; j < o_form.elements.length; j++) {
	  o_elt = o_form.elements[j]
		// alert(j + "  " + o_elt.name + " ! " + o_elt.type + " ! " +o_elt.disabled)
		if (o_elt && (o_elt.type != "hidden")) o_elt.disabled = !enabled
	}
}