var image_number = 1;
var old_image_number = 0;
var number_of_images;

function change_image()
{
	if(old_image_number)
	{
		Effect.Fade('home_'+old_image_number, { to: 0.0 });
	}
	Effect.Appear('home_'+image_number, { to: 1.0 });
	old_image_number = image_number;
	if(image_number == number_of_images)
	{
		image_number = 1;	
	}
	else
	{
		image_number++;
	}
	setTimeout("change_image()", 4000);
}