var rotate_delay = 4000; // delay in milliseconds (4000 = 4 secs)
current = 0;
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") ? "Play" : "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);
	}
}