function openAuthors(letter, autId)
{
	if (!isNaN(letter))
	{
		for(var i=65; i<=90; i++)
		{
			if(i != letter)
			{
				$("letter_"+i).className = "letter-normal";
			}
			else
			{
				$("letter_"+i).className = "letter-active";
			}
		}
		
		if (!isNaN(autId) && autId != 0)
		{
			var id = autId;
		}
		else
		{
			var id = 0;
		}
		
		new Ajax.Request('admin/getauthors.php?letter='+letter+'&id='+autId+'&rand='+new Date().getTime(),{
			method: 'get',
			onSuccess: function(transport){
				var authors = $("authors");
				authors.innerHTML = transport.responseText;
				if (authors.style.display == "none")
				{
					new Effect.BlindDown('authors');	
				}
			}
		});
	}	
}

function closeAuthors(id){
	if (authors.style.display != "none")
	{
		new Effect.BlindUp(id);
	}
}

function changeSignet(image, id){
	//alert(image + id);
	document.getElementById(id).src= "signets/" + image;
}

function changeBigSignet(image,evt)
{
	image = document.getElementById(image); // récup de l'image
	if (image.src.indexOf("recto") > 0) // on affiche le verso
	{
		image.src = image.src.replace("recto","verso");
	}
	else // on affiche le recto
	{
		image.src = image.src.replace("verso","recto");
	}
}