var lastSel;
function mostraitem(id){
	var dd = document.getElementById("dd"+id);
	var img = document.getElementById("imgduvida"+id);
	if(lastSel!=undefined && lastSel!=id){
		document.getElementById("dd"+lastSel).style.display="none";
		document.getElementById("imgduvida"+lastSel).src='img/abrir_duvida.gif';
	}
	dd.style.display = dd.style.display == "block" ? "none" : "block";
	img.src = img.src.indexOf('img/abrir_duvida.gif') != -1 ? 'img/fechar_duvida.gif' : 'img/abrir_duvida.gif';	
	lastSel = id;
	//matchSizes(document, 'sofaarea', 'container');
}