var interval = 4; // delay between rotating images (in seconds)
var random_display = 1; // 0 = no, 1 = yes
interval *= 1000;

var image_index = 0;
image_list = new Array();
image_list[image_index++] = new imageItem("spon_logos/cvs.jpg", "http://www.cvs.com/");
image_list[image_index++] = new imageItem("spon_logos/cvs.jpg", "http://www.cvs.com/");
image_list[image_index++] = new imageItem("spon_logos/aws.jpg", "http://www.alliedwasteservicesofcontracostacounty.com/");
image_list[image_index++] = new imageItem("spon_logos/bcc.jpg", "http://www.blackhawkcc.org/");
image_list[image_index++] = new imageItem("spon_logos/brlogo.jpg", "http://www.bishopranch.com/");
image_list[image_index++] = new imageItem("spon_logos/lpha.jpg", "http://www.lafayetteparkhotel.com/");
image_list[image_index++] = new imageItem("spon_logos/michelob.jpg", "http://www.michelob.com/");
image_list[image_index++] = new imageItem("spon_logos/mirassou.jpg", "http://www.mirassou.com/");
image_list[image_index++] = new imageItem("spon_logos/newage.jpg","http://www.newageelectric.com/");
image_list[image_index++] = new imageItem("spon_logos/hertz.jpg", "http://www.hertzequip.com/");
//image_list[image_index++] = new imageItem("spon_logos/lenoxlogo1.jpg", "http://www.lenox.com/index.cfm?dept=dining&cat=serveware&code=67042");
//image_list[image_index++] = new imageItem("spon_logos/chevron.jpg", "http://www.chevron.com/");
//image_list[image_index++] = new imageItem("spon_logos/extramile.jpg", "http://www.chevronextramile.com");
//image_list[image_index++] = new imageItem("spon_logos/san_ramon.jpg", "http://www.ci.san-ramon.ca.us/");


var number_of_image = image_list.length;

function imageItem(image_location, link) {
  this.image_item = new Image();
  this.image_item.src = image_location;
  this.image_item.link = link; 
}

function getNextImage() {
if (random_display) {
  image_index = Math.floor(Math.random() * image_list.length);
}
else {
  image_index = (image_index+1) % number_of_image;
}

  var new_image = image_list[image_index];
  return(new_image);
}

function rotateImage(rImage, link) {
  var new_image = getNextImage();
  document.getElementById('rImage').src = new_image.image_item.src;
  document.getElementById('rLink').href = new_image.image_item.link; 

  setTimeout("rotateImage()", interval);
}