//image sequence for Chelm's Combe Quarry photographs
var imgNo = 0;
var lastImg = 17;
if (document.images); {

   var pix = new Array();
	 for (i=0; i<=lastImg; i ++) {
	    pix[i] = new Image();
	    pix[i].src = "images/ccq/"+i+".jpg";
	 }
//
   function showImage(imgNo) {
	    document.picture.src = pix[imgNo].src;
	 }
//				 
   function nextImage()  {
	    imgNo ++;
   	  if (imgNo > lastImg) {
   	     imgNo=0;
	    }
	    showImage(imgNo);
   }
//
   function prevImage() {
      imgNo --;
	    if (imgNo < 0) {
	       imgNo=lastImg;
	    }
	    showImage(imgNo);
   } 
}