function set_focus(form_name, elt_name) {
  var o_form
  var o_elt

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

  o_elt = o_form[elt_name]
  if (!o_elt) return

  o_elt.focus()

  return
}

function set_text(form_name, elt_name, text, only_if_empty, css_class) {
  var o_form 
	var o_elt
	
	o_form = document.forms[form_name]
	if (!o_form) return
	
	o_elt = o_form[elt_name]
	if (!o_elt) return
	
	o_elt.className = css_class
	
	if (only_if_empty) {
	  if (o_elt.value == "") o_elt.value = text
	} else {
	  o_elt.value = text
		o_elt.focus()
	}
}

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
}