function open_help(topic) {
	// IE hack
	if (document.getElementById('navigation_select')) {
		document.getElementById('navigation_select').style.visibility = 'hidden';
	}
	document.getElementById('help_div').style.visibility = 'visible';
	loadXMLDoc('ajax/help.php?topic=' + topic, 'help_div_content');
}

function close_help() {
	document.getElementById('help_div').style.visibility = 'hidden';
	// IE hack
	if (document.getElementById('navigation_select')) {
		document.getElementById('navigation_select').style.visibility = 'visible';
	}
}

function reload_topic(topic) {
	loadXMLDoc('ajax/help.php?topic=' + topic, 'help_div_content');
}