// JavaScript Document
function ajaxFunction() {
var xmlHttp;
try {
// Firefox, Opera 8.0+, Safari
xmlHttp=new XMLHttpRequest();
return xmlHttp;
} catch (e) {
// Internet Explorer
try {
xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
return xmlHttp;
} catch (e) {
try {
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
return xmlHttp;
} catch (e) {
alert("Tu navegador no soporta AJAX!");
return false;
}}}
}

function Enviar(_pagina,capa) {
var
ajax;
ajax = ajaxFunction();

ajax.open("POST", _pagina, true);

ajax.setRequestHeader("Content-Type",
"application/x-www-form-urlencoded");
ajax.onreadystatechange = function()
{

if (ajax.readyState == 4)
{
document.getElementById(capa).innerHTML =
ajax.responseText;

}}
ajax.send(null);
}