window.addEvent('domready', function () {
									  
						var footer = $('menu_image').getChildren();
	
	footer.forEach(function (un_menu_image) {


if (footer) {			
	       var fx = new Fx.Tween(un_menu_image, {link:"cancel", property:"background-position"});
           
		   if (un_menu_image === $('image_entreprise')){ 
			   fx.set('bottom left'); 
		   		un_menu_image.addEvent('mouseover',function() {
               		fx.set('top left');
				});
           		un_menu_image.addEvent('mouseleave',function() {
               		fx.set('bottom left'); 
           		});
		   }else{  
		   		fx.set('top left'); 
           		un_menu_image.addEvent('mouseover',function() {
               		fx.set('bottom left');
				});
           		un_menu_image.addEvent('mouseleave',function() {
               		fx.set('top left'); 
           		});
		   }       	
	   }
	   
	});			  
									  
			  
									  
    $("logo").addEvent('mouseover', function () {
		$('logo').setStyle( 'background-position', '0px 0px');
	});
	$("logo").addEvent('mouseleave', function () {
		$('logo').setStyle( 'background-position', '0px -125px');
	});
	
	if ($('sous_menu')!= null){
	    var menu = $('sous_menu');
  		var y_init_menu = menu.getPosition().y
  		var tween_y_menu = new Fx.Tween(menu, {property:"top", link:"cancel"});
  		
      
  function update_menu() { if (window.getScroll().y > 250) {
        tween_y_menu.start(window.getScroll().y - 250);
		if ( window.getScroll().y > $('menu_contenu').getSize().y + 250 - menu.getSize().y ) { 
			
			tween_y_menu.start($('menu_contenu').getSize().y - menu.getSize().y + 30);
		} 
			

      } else {
		   tween_y_menu.start(0);   
              }
      
  }
  update_menu();
  window.addEvent('scroll',update_menu);
  window.addEvent('resize',update_menu);
	}
	
});