var delay = 2000
var imgNum = 1

// Preload animation images

theImg = new Array()


for( i = 1; i < 18; i++) 
{
   theImg[i] = new Image()
   theImg[i].src = "images/image" + i + ".jpg"
}

 function animate()
{
   document.animation.src = theImg[imgNum].src
   imgNum++
   if(imgNum > 17) { 
   	imgNum = 1
   }
 }

function slower() 
{
   delay+=10
   if(delay > 2000) {
   delay = 2000;
   }
}

function faster() 
{
   delay-=10
   if(delay < 0) {
   delay = 0;
   }
}