// JavaScript Document
var timer;
var currentFeature = 1;
var maxFeature = 4;

function changeFeature(){
	currentFeature++;
	if( currentFeature > maxFeature ) currentFeature = 1;
	setActiveFeature( currentFeature );
}

function setActiveFeature( id ){
	clearTimeout( timer );
	currentFeature = id;
	for( var i = 1; i <= 4; i++ ){
		if( i == id ){
			$('button' + i ).className = 'active';
			$('banner' + i ).className = 'active';
		}else{
			$('button' + i ).className = 'inactive';
			$('banner' + i ).className = 'inactive';
		}
	}
	timer = setTimeout( 'changeFeature();', 4000 );
}