var timer = null;

function menud(statut,id)
{
	if(statut == 'out')
	{
		timer = setTimeout("document.getElementById('"+id+"').style.visibility = 'hidden';",200);
	}
	else
	{
		if(id != 'menuqui') document.getElementById('menuqui').style.visibility = 'hidden';
			if(id != 'menuchasse') document.getElementById('menuchasse').style.visibility = 'hidden';
	
		document.getElementById(id).style.visibility = 'visible';
		clearTimeout(timer);
	}	
}

 <!--
 function changeImageInfo(imageURL,title)
  {
  document.big_image.src = imageURL;
  //document.image_form.image_title.value = title;

  }
 //-->