function show_hide_popup(img){
	var el = img.nextSibling;
	while ((el.nodeName != 'DIV')&&(el.nodeName != null)&&(el.nodeName != 'IMG')) {el = el.nextSibling}
	if ((el.nodeName == 'DIV')&&(el.style.visibility == 'visible')){el.style.visibility = 'hidden'}else{el.style.visibility = 'visible'}
}