function muestraInfo(pagina,div){
	var ajax=nuevoAjax();
	ajax.open("GET", pagina,true);
	ajax.onreadystatechange=function() {
		if(ajax.readyState==1){
                       document.getElementById(div).innerHTML = "<center><img src='images/ajax-loader.gif'></center>";
		}
		if (ajax.readyState==4) {
			var text = ajax.responseText
			document.getElementById(div).innerHTML=text;
			}
	 	}
	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	ajax.send(null);
}
function compruebaForm(pagina,div,valor){
	var ajax=nuevoAjax();
	ajax.open("POST", pagina,true);
	ajax.onreadystatechange=function() {
		
		if (ajax.readyState==4) {
			var text = ajax.responseText
			document.getElementById(div).innerHTML=text;
			}
	 	}
	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	ajax.send("valor=" + valor + "&div=" + div);
}
function compruebaFormFinal(pagina,div,valor1,valor2,valor3,valor4){
	var ajax=nuevoAjax();
	ajax.open("POST", pagina,true);
	ajax.onreadystatechange=function() {
		if(ajax.readyState==1){
                       document.getElementById(div).innerHTML = "<center><img src='images/ajax-loader.gif'></center>";
		}
		if (ajax.readyState==4) {
			var text = ajax.responseText
			document.getElementById(div).innerHTML=text;
			}
	 	}
	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	ajax.send("valor1=" + valor1 + "&valor2=" + valor2 + "&valor3=" + valor3 + "&valor4=" + valor4 + "&div=" + div);
}
function muestraNotas(pagina,div,valor){
	var ajax=nuevoAjax();
	ajax.open("POST", pagina,true);
	ajax.onreadystatechange=function() {
		if(ajax.readyState==1){
                       document.getElementById(div).innerHTML = "<center><img src='images/ajax-loader.gif'></center>";
		}
		if (ajax.readyState==4) {
			var text = ajax.responseText
			document.getElementById(div).innerHTML=text;
			}
	 	}
	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	ajax.send("valor=" + valor);
}