var curImgIdx = 1;
var changeInterval = 4 * 1000; /*Time between changing images  */
var images = new Array ( );

/* The image files, add more lines here to add images  */
images[0] = 'images/rotatingimage1.jpg';
images[1] = 'images/rotatingimage.jpg';
images[2] = 'images/rotatingimage2.jpg';
images[3] = 'images/rotatingimage3.jpg';
images[4] = 'images/rotatingimage4.jpg';
images[5] = 'images/rotatingimage5.jpg';
images[6] = 'images/rotatingimage6.jpg';
images[7] = 'images/rotatingimage7.jpg';
images[8] = 'images/rotatingimage8.jpg';
images[9] = 'images/rotatingimage9.jpg';
images[10] = 'images/rotatingimage10.jpg';
images[11] = 'images/rotatingimage11.jpg';
/******************************/

for ( i = 0; i < images.length; i++ ) {
	var loadImg = new Image ( );
	loadImg.src = images[i];
}

window.setInterval ( function () {
  if ( curImgIdx >= images.length ) {
	curImgIdx = 0;
  }
  document.getElementById ( 'chgImg' ).src = images[curImgIdx];
  curImgIdx++;
}, changeInterval );