// JavaScript Document
var i = 1;
// total number of images
myTotalImg=10;
function loadImg(){
  document.imgSrc.src = myImgSrc + i + "_" + myImgName + myImgEnd;
}

// Create link function to switch image backward
function prev(){
  if(i<1){
    var l = i= 10;
  } else {
    var l = i-=1;
  }
  document.imgSrc.src = myImgSrc + l + "_" + myImgName + myImgEnd;
}

// Create link function to switch image forward
function next(){
  if(i>=myTotalImg){
    var l = i = 1;
  } else {
    var l = i+=1;
  }
  document.imgSrc.src = myImgSrc + l + "_" + myImgName + myImgEnd;
}
// Tell browser the type of file
myImgEnd = ".jpg"

// Load function after page loads
window.onload=loadImg;