function toggle_help(a_help_panel_id, a_image_button_id) {

	image_button = document.getElementById(a_image_button_id);

	help_panel = document.getElementById(a_help_panel_id);

	if (help_panel.className == 'helplayer-active') {
		close_help(help_panel, image_button);
	}
	else {
		activate_help(help_panel, image_button);
	}
}


function activate_help(a_help_panel, a_image_button)
{
	a_image_button.src = a_image_button.src.replace(/.png/, '_pressed.png');

	a_help_panel.className = 'helplayer-active';

	a_help_panel.style.display = 'block';
}


function close_help(a_help_panel, a_image_button)
{
	a_image_button.src = a_image_button.src.replace(/_pressed/, '');

	a_help_panel.className = 'msfg-helplayer';

	a_help_panel.style.display = 'none';
}