var i = 0 ;

$(document).ready( function(){
	var diapo_interval = setInterval( 'diaporama()' , 8000 ); 
}); 

function show( id_img ){ 

	$('#'+id_img).css('margin-left','660px'); 
	$('#'+id_img).css('z-index','3'); 

	slide( id_img , 660 ); 
} 

function slide( id_img , left ){ 
	if( left >= 0 ){ 
		if( left <= 100 ) 
			left = 0 ; 
		$('#'+id_img).css('margin-left', left + 'px'); 
		setTimeout( function(){slide( id_img , left - 70 );}, 23 ); 
	} else{
	
		$('#diaporama > img ').css('z-index','1'); 
		$('#'+id_img).css('z-index','2'); 
	}
}

function diaporama(){ 
	i++; 
	if( i > $('#diaporama > img ').length ) 
		i = 1 ; 
	show( 'img' + i ); 
}