function nuevoAjax(){ 
	var xmlhttp=false;
	try{xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");}
	catch(e){
		try{xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");}
		catch(E){if (!xmlhttp && typeof XMLHttpRequest!='undefined') xmlhttp=new XMLHttpRequest();}
	}
	return xmlhttp; 
}

function cambiaMunicipio(){
	ajax=nuevoAjax();
	ajax.open("POST", "cambia-municipio-ajax.php", true);
	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	document.getElementById("pedania").length = 1;
	document.getElementById("pedania").options[0].text="Cargando...";
	ajax.send("&municipio=" + document.getElementById("municipio").value + "&indiferente=si");
	ajax.onreadystatechange=function() {
		if (ajax.readyState==4) {
			document.getElementById("pedania").parentNode.innerHTML=ajax.responseText;
		}
	}
}

function calculaHipoteca(){
	ajax=nuevoAjax();
	ajax.open("POST", "calcula-hipoteca-ajax.php", true);
	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	ajax.send("cantidad=" + document.getElementById("cantidad").value + "&entrada=" + document.getElementById("entrada").value + "&interes=" + document.getElementById("interes").value + "&anos=" + document.getElementById("anos").value);
	ajax.onreadystatechange=function() {
		if (ajax.readyState==4) {
			document.getElementById("resultadoHipoteca").innerHTML=ajax.responseText;
		}
	}
}