var position_slider = 0;
var increment = 0;
var truc_actif = 1;

$(document).ready(
	function () {
		$(".service").css("padding-right", "24px");
		if ($(".service").length >3) {
			$("#slideshow_slider").width($(".service").length * ($(".service:first").width()+24));
			
			increment = $("#slideshow_slider").width() / $(".service").length;
			
			$(".slideshow_gauche").	bind("click", {sens : "negatif"}, slideServices).css("opacity", "0.5").css("cursor", "default");
			$(".slideshow_droite").		bind("click", {sens : "positif"}, slideServices);
		} else {
			$(".slideshow_gauche").hide();
			$(".slideshow_droite").hide();
		}
	}
);

function slideServices (event) {
	var truc = -(($("#slideshow_slider").width() / $(".service").length) * Math.ceil($(".service").length/2));
	
	if (event.data.sens == "positif") {
		if (truc_actif < $(".service").length - 2) {
			position_slider = position_slider - increment;
			truc_actif++;
		}
	} else if (event.data.sens == "negatif") {
		if (truc_actif > 1) {	
			position_slider = position_slider + increment;
			truc_actif--;
		}
	}
	
	// Animation
	$("#slideshow_slider").animate({left: position_slider + "px"}, 200);
	
	if (truc_actif < $(".service").length - 2) 	$(".slideshow_droite").		css("opacity", "1").		css("cursor", "pointer");
	else													$(".slideshow_droite").		css("opacity", "0.5").	css("cursor", "default");
	if (truc_actif > 1)								$(".slideshow_gauche").	css("opacity", "1").		css("cursor", "pointer");
	else													$(".slideshow_gauche").	css("opacity", "0.5").	css("cursor", "default");
	
	return false;
	
}