var rotate_delay = 5000; // delais en microseconde (4000 = 4 secs)
current = 0;
var nb_photo = document.getElementById('show').getAttribute('nb_photo');

function lessdelay() {
  if (rotate_delay <= 1000) {
	rotate_delay = rotate_delay-100; 
	document.slideform.delay.value = rotate_delay; 
  }else {
	rotate_delay = rotate_delay-500; 
	document.slideform.delay.value = rotate_delay; 
  }
}

function moredelay() {
  if (rotate_delay < 1000) {
	rotate_delay = rotate_delay+100; 
	document.slideform.delay.value = rotate_delay; 
  }else {
	rotate_delay = rotate_delay+500; 
	document.slideform.delay.value = rotate_delay; 
  }
}

function next() {
  if (document.slideform.slide[current+1]) {
	document.images.show.src = document.slideform.slide[current+1].value;
	document.slideform.slide.selectedIndex = ++current;
  }else first();
}

function previous() {
  if (current-1 >= 0) {
	document.images.show.src = document.slideform.slide[current-1].value;
	document.slideform.slide.selectedIndex = --current;
  }else last();
}

function first() {
  current = 0;
  document.images.show.src = document.slideform.slide[0].value;
  document.slideform.slide.selectedIndex = 0;
}

function last() {
  current = document.slideform.slide.length-1;
  document.images.show.src = document.slideform.slide[current].value;
  document.slideform.slide.selectedIndex = current;
}

function ap(text) {
document.slideform.slidebutton.value = (text == "Stop") ? " > " : "Stop";
rotate();
}
function change() {
  current = document.slideform.slide.selectedIndex;
  document.images.show.src = document.slideform.slide[current].value;
}

function rotate() {
 /* if (document.slideform.slidebutton.value == "Stop") {

	current = (current == document.slideform.slide.length-1) ? 0 : current+1;
	document.images.show.src = document.slideform.slide[current].value;
	document.slideform.slide.selectedIndex = current;
	window.setTimeout("rotate()", rotate_delay);
  }*/
	current = (current == nb_photo-1) ? 0 : current+1;
	document.images.show.src = document.getElementById('photo_'+current).getAttribute('value');
	window.setTimeout("rotate()", rotate_delay);
}