// JavaScript Document

var current = 0;
function next(show,slide){ // forward one image
	if(slide[current+1]){
		show.src = slide[current+1].value;
		slide.selectedIndex = ++current;
	}else{
		first(show,slide);
	}
}

function previous(show,slide){ // back on image
	if((current-1) >= 0){
		show.src = slide[current-1].value;
		slide.selectedIndex= --current;
	}else{
		last(show,slide);
	}
}

function first(show,slide){ // jump to first image
	current=0;
	show.src = slide[0].value;
	slide.selectedIndex=0;
}

function last(show,slide){ // this is jump to last image
	current=(slide.length-1);
	show.src = slide[current].value;
	slide.selectedIndex=current;
}

function ap(slidebutton,text,show,slide){ // this controls the auto-play and/or auto-stop
	slidebutton.value=(text == "Stop") ? "Départ" : "Stop";
	
	rotate(show,slide,slidebutton);
}

function change(show,slide){ // this is for the pulldown menu
	current=slide.selectedIndex;
	show.src = slide[current].value;}

function rotate(show,slide,slidebutton) {
	if (slidebutton.value == "Stop") {
	
		current = (current == slide.length-1) ? 0 : current+1;
		show.src = slide[current].value;
		slide.selectedIndex = current;
		window.setTimeout("rotate(show,slide,slidebutton)", 3000);
		//alert("show"+show);
	}
}

function legende(nbphotos,num){
	document.getElementById('legende'+num).style.display = "block";
	for(var i=1;i<=nbphotos;i++){
		if(i!=num){
			document.getElementById('legende'+i).style.display = "none";
		}
	}
	
}
function legendeOff(num){
	document.getElementById('legende'+num).style.display = "none";
	
	
}