var current_content = 'bio';
var in_progress = false;

function show_content(id)
{
	if (id != current_content && !in_progress)
	{
		in_progress = true;
		$('#content-'+current_content).fadeOut(500, function () { current_content = id; $('#content-'+current_content).fadeIn(500, function () { in_progress = false; }) });	
	}
}