var num=0;

imgArray = [
  ['images/store pics/1.jpg','information', 'Alpine Auto Gallery Gallery Pictures - Yard 01'],
  ['images/store pics/2.jpg','interference','Alpine Auto Gallery Gallery Pictures - Yard 02'],
  ['images/store pics/3.jpg','interference','Alpine Auto Gallery Gallery Pictures - Yard 03'],
  ['images/store pics/4.jpg','interference','Alpine Auto Gallery Gallery Pictures - Customer Waiting Area'],
  ['images/store pics/5.jpg','interference','Alpine Auto Gallery Gallery Pictures - Customer Waiting Area'],
  ['images/store pics/6.jpg','interference','Alpine Auto Gallery Gallery Pictures - Office'],
  ['images/store pics/7.jpg','interference','Alpine Auto Gallery Gallery Pictures - Work Bay Area'],
  ['images/store pics/8.jpg','interference','Alpine Auto Gallery Gallery Pictures - Work Bay Area'],
  ['images/store pics/9.jpg','interference','Alpine Auto Gallery Gallery Pictures - Work Bay Area'],
  ['images/store pics/10.jpg','interference','Alpine Auto Gallery Gallery Pictures - Spray Booth'],
  ['images/store pics/11.jpg','interference','Alpine Auto Gallery Gallery Pictures']
]

function slideshow(slide_num) {
  document.getElementById('mypic').src=imgArray[slide_num][0];
  document.getElementById('mypic').alt=imgArray[slide_num][1];
  document.getElementById('burns').innerHTML=imgArray[slide_num][2];
}

function slideshowUp() {
  num++;
  num = num % imgArray.length;
  slideshow(num);
}

function slideshowBack() {
  num--;
  if (num < 0) {num=imgArray.length-1;}
  num = num % imgArray.length;
  slideshow(num);
}