var f=0
 var i=0
 var t = 40
 var p=1000
 
 function startShow() {
 window.setTimeout ("pauseSlide()", p);
 }
 
 function pauseSlide() {
 if ( i < 7){
 nextSlide();
 window.setTimeout ("pauseSlide()", p);
 }
 }
 
 function nextSlide() {
 i = ++i;
 fadeImage();
 }
 
 function fadeImage() {
 if (f==20){
 document.getElementById("introimage" + i).className="fadeimage20";
 f=0;
 }
 else{
 document.getElementById("introimage" + i).className="fadeimage" + f;
 f = ++f
 window.setTimeout ("fadeImage()", t);
 }
 }