function preloader() {
    wobble1 = new Image(); 
    wobble1.src = "img/signUpHOVER.gif";
    wobble2 = new Image(); 
    wobble2.src = "img/sideNoteHeadingHOVER.gif";
}

var dykIMGArray= new Array(5)
  dykIMGArray[0]= "img/dykBoxIMG.jpg";
  dykIMGArray[1]= "img/dykBoxIMG2.jpg";
  dykIMGArray[2]= "img/dykBoxIMG3.jpg";
  dykIMGArray[3]= "img/dykBoxIMG5.jpg";
  dykIMGArray[4]= "img/dykBoxIMG6.jpg";
  dykIMGArray[5]= "img/dykBoxIMG7.jpg";
  
var dykTextArray= new Array(5)
  dykTextArray[0]= "DID YOU KNOW EVERY YEAR ENOUGH PRINTER CARTRIDGES ARE THROWN AWAY TO ALMOST FILL BIG BEN?";
  dykTextArray[1]= "ISN’T IT SHOCKING THAT EVERY CARTRIDGE THROWN INTO LANDFILL CAN TAKE UP TO 1000 YEARS TO DECOMPOSE?";
  dykTextArray[2]= "THINK OF US AS A KIND OF PETROL STATION FOR YOUR EMPTY PRINTER CARTRIDGES";
  dykTextArray[3]= "YOU WOULDN’T THROW YOUR KETTLE AWAY WHEN IT RAN OUT OF WATER WOULD YOU? YOU'D SIMPLY REFILL IT!";
  dykTextArray[4]= "DID YOU THINK ALL PRINTER CARTRIDGES WERE THE SAME?";
  dykTextArray[5]= "DID YOU KNOW ONE CUSTOMER HAS REFILLED THE SAME TONER CARTRIDGE AN AMAZING 46 TIMES, SAVING AN INCREDIBLE £1800?";

var i = 0;

// Create function to load image
function load(){
  var dykIMG = document.getElementById('dykIMG');
  var dykText = document.getElementById('dykText');
  dykIMG.src = dykIMGArray[i];
  dykText.innerHTML = dykTextArray[i];
}

// Create link function to switch image backward
function prev(){
  if(i<1){
    var l = i;
  } if (i==0) {
    i = 5;
    var l = i;
  }else {
    var l = i-=1;
  }
  var dykIMG = document.getElementById('dykIMG');
  var dykText = document.getElementById('dykText');
  dykIMG.src = dykIMGArray[l];
  dykText.innerHTML = dykTextArray[l];
}

// Create link function to switch image forward
function next(){
  if(i>4){
    var l = i;
  } if (i==5) {
    i = 0;
    var l = i;
  } else {
    var l = i+=1;
  }
  var dykIMG = document.getElementById('dykIMG');
  var dykText = document.getElementById('dykText');
  dykIMG.src = dykIMGArray[l];
  dykText.innerHTML = dykTextArray[l];
}

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