function empty(mixed_var) {
    var key;
    
    if (mixed_var === "" ||
        mixed_var === 0 ||
        mixed_var === "0" ||
        mixed_var === null ||
        mixed_var === false ||
        mixed_var === undefined
    ){
        return true;
    }

    if (typeof mixed_var == 'object') {
        for (key in mixed_var) {
            return false;
        }
        return true;
    }

    return false;
}




function mostra(id, nome){
	document.getElementById(id).style.display = "block";
	document.getElementById("lin"+id).innerHTML = "<a href='javascript: void(0);' onclick=\"oculta('"+id+"', '"+nome+"')\">"+nome+"</a>";
	
	if(empty(document.getElementById('linkAtivo').value) == false){
		idAnt = document.getElementById('linkAtivo').value;
		nomeAnt = document.getElementById('linkNome').value;
		oculta(idAnt, nomeAnt);
	}
	
	document.getElementById('linkAtivo').value = id;
	document.getElementById('linkNome').value = nome;
}

function oculta(id, nome){
	document.getElementById(id).style.display = "none";
	document.getElementById("lin"+id).innerHTML = "<a href='javascript: void(0);' onclick=\"mostra('"+id+"', '"+nome+"')\">"+nome+"</a>";
	
	if(empty(document.getElementById('linkAtivo').value) == false){
		document.getElementById('linkAtivo').value = "";
		document.getElementById('linkNome').value = "";

	}
}