var req;

function addbook(valor) {

if(window.XMLHttpRequest) {
   req = new XMLHttpRequest();
}
else if(window.ActiveXObject) {
   req = new ActiveXObject("Microsoft.XMLHTTP");
}

var url = "adiciona-ao-livro.php?valor="+valor;

req.open("Get", url, true);

req.onreadystatechange = function() {

	if(req.readyState == 1) {
		document.getElementById('resultado').innerHTML = '...';
	}

	if(req.readyState == 4 && req.status == 200) {

	var resposta = req.responseText;

	document.getElementById('resultado').innerHTML = resposta;
	}
}
req.send(null);
}

function delbook(valor) {

if(window.XMLHttpRequest) {
   req = new XMLHttpRequest();
}
else if(window.ActiveXObject) {
   req = new ActiveXObject("Microsoft.XMLHTTP");
}

var url = "apagar-do-livro.php?valor="+valor;

req.open("Get", url, true);

req.onreadystatechange = function() {

	if(req.readyState == 1) {
		document.getElementById('resultado').innerHTML = '...';
	}

	if(req.readyState == 4 && req.status == 200) {

	var resposta = req.responseText;

	document.getElementById('resultado').innerHTML = resposta;
	}
}
req.send(null);
}

function reenviacod(valor) {

if(window.XMLHttpRequest) {
   req = new XMLHttpRequest();
}
else if(window.ActiveXObject) {
   req = new ActiveXObject("Microsoft.XMLHTTP");
}

var url = "reenvia.php?valor="+valor;

req.open("Get", url, true);

req.onreadystatechange = function() {

	if(req.readyState == 1) {
		document.getElementById('resultadoR').innerHTML = '...';
	}

	if(req.readyState == 4 && req.status == 200) {

	var resposta = req.responseText;

	document.getElementById('resultadoR').innerHTML = resposta;
	}
}
req.send(null);
}