var bars = Array('welcome', 'choice', 'member', 'login_feedback');

function show_bar(bar_name)
{
	// Hide other bars
	for(var i =0; i < bars.length; i++)
	{
		document.getElementById(bars[i] + '_bar').style.display = 'none';
	}
	
	// Show selected bar
	document.getElementById(bar_name + '_bar').style.display = 'block';
	
	return false;
}