/**
 * gestion des vignettes des "à la une"
 */
var alu = {
  Active   : 1,
  anim     : '',
  animStop : 0,
  total    : 0,
  url      : new Array(),
  
  
  init : function() {
    alu.ev();
    alu.AfficheMenu( 1 );

    for( var i = 2; i <= alu.total; i++ )
      alu.CacheMenu( i );

    alu.affiche( 1 );
    },
    
    
  ev: function() {
    $$( '#UNE li' ).addEvents( {
      'mouseover': function() {
        if( !this.id )
          return;
        
        alu.animStop = 1;
        alu.affiche( this.id.substr( 10 ));
        },

      'click': function() {
        if( !this.id )
          return;
        
        location.href = alu.url[ ( this.id.substr( 10 ) -1 ) ];
        }
      });
    },
  
    
  AfficheMenu : function( id ) {
    $( "fleche_" + id ).setStyle( 'display', 'inline' );

    $( "calque_txt_" + id ).addClass( 'calque_txt' );

    $( "AlauneMenu_" + id ).addClass( 'sel' );
    $( "AlauneMenu_" + id ).removeClass( 'non_sel' );
    },
    
    
  CacheMenu : function( id ) {
    $( "calque_txt_" + id ).removeClass( 'calque_txt' );

    $( "AlauneMenu_" + id ).addClass( 'non_sel' );
    $( "AlauneMenu_" + id ).removeClass( 'sel' );

    $( "fleche_" + id ).setStyle( 'display', 'none' );
    },
    
    
  affiche : function( n ) {
    if( alu.Active != n )
      {
      $( "Alaune_bloc" + n ).setStyle( 'display', 'block' );
      alu.AfficheMenu( n );

      $( "Alaune_bloc" + alu.Active ).setStyle( 'display', 'none' );
      alu.CacheMenu( alu.Active );
      
      alu.Active = n;
      }

    if (alu.anim != '') {window.clearTimeout(alu.anim);}
    if (alu.animStop != 1)
      {
      if( n == 4 )
        n = 1;
      else
        n++;

      alu.anim = window.setTimeout( 'alu.affiche( '+ n +')', 8000 );
      }
    }
  };