$( document ).ready( function() {
  $( 'a[href*=#]' ).each( function() {
    if ( $( this ).attr( 'href' ) != '#' ) {
      $( this ).click( function() {
        if ( location.pathname.replace( /^\//, '' ) == this.pathname.replace( /^\//, '' ) && location.hostname == this.hostname ) {
          var $target = $( this.hash );  
          $target = $target.length && $target || $( '[name=' + this.hash.slice( 1 ) + ']' );
          if ( $target.length ) {  
            var targetOffset = $target.offset().top;
            $( 'html,body' ).animate( { scrollTop: targetOffset }, 500 ); // Vitesse du scroll
            return false;  
          }
        }
      })
    }
  });  
});