/*
 * Simple theme changer
 * Tracks active theme in rel, changes themes by adjusting body class
 */
function changeTheme( theme )
{
	var $body = $( "body" );
	var rel = $body.attr( "rel" );
	if ( rel ) $body.removeClass( rel );
	$body.addClass( theme );
	$body.attr( "rel", theme );
}