//assumes movement.js

function init(){
  sprite = document.getElementById("sprite");
  document.onkeydown = keyListener;
} // end init
      
function keyListener(e){
  // if e doesn't already exist, we're in IE so make it

  if (!e){
    e = window.event;
  } // end IE-specific code
        
  //left
  if (e.keyCode == 37){
    moveSprite(-10, 0);
  } // end if

  //up
  if (e.keyCode == 38){
    moveSprite(0, -10);
  } // end if

  //right
  if (e.keyCode == 39){
    moveSprite(10, 0);
  } // end if

  //down
  if (e.keyCode == 40){
    moveSprite(0, 10);
  } // end if

} // end keyListener