function highlight_tab(o)
{
	d = o.parentNode.immediateDescendants();
	for(i=0; i<d.length; i++)
	{
		d[i].removeClassName('tab_selected');
	}

	o.addClassName('tab_selected');

	$('tab_error_messages').hide();
}

function show_tab_section(id)
{
	sections = $('tab_content').getElementsByClassName('tab_section');
	for(i = 0; i < sections.length; i++)
	{
		sections[i].hide();

		if(sections[i].id == id)
			sections[i].show();
	}

	return true;
}