Merci

gistfile1.js

$(function() {
	$("#fond").attr("src","./images/regions_"+ancre+"00.png");
	var slider = $("#slider").slider({
		value:0,
		min:0,
		max:65,
		slide: function( event, ui ) {
			var nombre = ("0" + ui.value).slice(-2)
			$("#fond").attr("src","./images/regions_"+ancre+nombre+".png");
		}
	});
	$('.ui-slider-handle', slider).draggable();
});