var rotate_delay = 3500;
current = 0;


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

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

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

function ap(text) 
{
	document.slideform.slidebutton.value = (text == "Arrêter le diaporama") ? "Démarrer le diaporama" : "Arrêter le diaporama";
	rotate();
}


function change() 
{
	current = document.slideform.slide.selectedIndex;
	document.images.showed.src = document.slideform.slide[current].value;
}
		
function rotate() 
{
	if (document.slideform.slidebutton.value == "Arrêter le diaporama") 
	{
		current = (current == document.slideform.slide.length-1) ? 0 : current+1;
		document.images.showed.src = document.slideform.slide[current].value;
		document.slideform.slide.selectedIndex = current;
		window.setTimeout("rotate()", rotate_delay);
	}
}