function init_slideshow(carid)
{
	var nbItem = $('#' + carid + ' li').size();
	$("#slider").slider({
		min: 140,
		max: (nbItem - 2) * 140,
		slide: function(event, ui) {
			for (p=0; p<nbItem; p++){
				var wimg = Math.max(0, 250 - Math.abs(p*140 - ui.value)) * (120/250);
				var himg = Math.max(0, 250 - Math.abs(p*140 - ui.value)) * (70/250);
				var wli = Math.max(0, 250 - Math.abs(p*140 - ui.value)) * (140/250);
				var t = 5 + ((70-himg)/2);
				$('#' + carid + ' li img').eq(p).css({width:wimg , height:himg});
				$('#' + carid + ' li').eq(p).css({'padding-top':t});
				$('#' + carid + ' li').eq(p).css({width:wli});				
			} 			
		}
	});
	// valeurs debut : ui.value = 280
	for (p=0; p<nbItem; p++) {
		var wimg = Math.max(0, 250 - Math.abs(p*140 - 140)) * (120/250);
		var himg = Math.max(0, 250 - Math.abs(p*140 - 140)) * (70/250);
		var wli = Math.max(0, 250 - Math.abs(p*140 - 140)) * (140/250);
		var t = 5 + ((70-himg)/2);
		$('#' + carid + ' li img').eq(p).css({width:wimg , height:himg});
		$('#' + carid + ' li').eq(p).css({'padding-top':t});
		$('#' + carid + ' li').eq(p).css({width:wli});
	}
}