var tVar = null;
function random_image(pics,dir)
{
    tVar = setTimeout('random_image(pics,dir)', 10000);
	var id = 'testimonial';
	var full_dir = dir;
	var rand_num
	
	if (pics.length == 1)
	{
		rand_num = 0;	
	}
	else
	{
		rand_num = Math.round(Math.random()*(pics.length -1));
	}
	
	var pic_url = full_dir + pics[rand_num];
	
	document["testimonial"].src = pic_url;
	
}