function changeDisplayStateDiv(id_hide,id_show,html_hide,html_show)
{
    d = document.getElementById(id_hide);
    e = document.getElementById(id_show);
    if (e.style.display == 'none' || e.style.display == '') {
	e.style.display = 'block';
	d.innerHTML = html_hide;
    } else {
	e.style.display = 'none';
	d.innerHTML = html_show;
    }
}
function setDisplay(id_hide, id_show)
{
	h = document.getElementById(id_hide);
	s = document.getElementById(id_show);
	s.style.display = 'block';
	h.style.display = 'none';
}
function changeDisplay(id_show_hide)
{
	h = document.getElementById(id_show_hide);
	if (h.style.display == 'block')
		h.style.display = 'none';
	else
		h.style.display = 'block';
}
function switchDisplay(id_hide, id_show)
{
	h = document.getElementById(id_hide);
	s = document.getElementById(id_show);
	if (h.style.display == 'none' && s.style.display == 'block') {
		h.style.display = 'block';
		s.style.display = 'none';
	} else {
		h.style.display = 'none';
		s.style.display = 'block';
	}
}
function switchVisibility(id_hide, id_show)
{
	h = document.getElementById(id_hide);
	s = document.getElementById(id_show);
	if (h.style.visibility == 'hidden' && s.style.visibility == 'visible') {
		h.style.visibility = 'visible';
		s.style.visibility = 'hidden';
	} else {
		h.style.visibility = 'hidden';
		s.style.visibility = 'visible';
	}
}
function setText(id_text, text)
{
	d = document.getElementById(id_text);
	d.innerHTML = text;
}