var openImg = new Image();
openImg.src = "_img/open.gif";
var closedImg = new Image();
closedImg.src = "_img/closed.gif";


function showBranch(branch){
	eval(swapFolder("open"+branch));
	var objBranch = document.getElementById("extra" + branch).style;
	var objText = document.getElementById("link" + branch);
	if(objBranch.display=="block") {
		objBranch.display="none";
		objText.innerHTML="Mostra gli altri commenti";
	} else {
		objBranch.display="block";
		objText.innerHTML="Nascondi gli altri commenti";
	}
}

function swapFolder(img){
	objImg = document.getElementById(img);
	if(objImg.src.indexOf('closed.gif')>-1)
		objImg.src = openImg.src;
	else
		objImg.src = closedImg.src;
}