var current_image = -1;
var next_image = 0;

var image = new Array();

function init() {
	if(document.getElementsByClassName("image")) {
		image = document.getElementsByClassName("image");
		for(i=1; i < image.length; i++) {
			image[i].style.display = "none";
		}
	}
	document.getElementById("previous").innerHTML = "";
}

function img(dir) {
	if(dir == 'next') {
		current_image = next_image;
		next_image++;
	} else {
		current_image = next_image;
		next_image--;
	}
	
	new Effect.BlindUp(image[current_image]);
	new Effect.BlindDown(image[next_image]);
	
	if(next_image > 0) {
		document.getElementById("previous").innerHTML = "<a href=\"javascript:img('previous')\">Précédente</a>";
	} else {
		document.getElementById("previous").innerHTML = "";
	}
	
	if(next_image < (image.length-1)) {
		document.getElementById("next").innerHTML = "<a href=\"javascript:img('next')\">Suivante</a>";
	} else {
		document.getElementById("next").innerHTML = "";
	}
}