Problem with AJAX

[fbio]

How do you do, this code, through SetIntrerval, what would the file be once every 2 seconds?

params = "text=sens"
request = new ajaxRequest()
request.open("POST", "send.php", true)
request.setRequestHeader("Content-type", "application/x-www-form-urlencoded")

request.setRequestHeader("Content-length", params.length)

request.setRequestHeader("Connection", "close")
request.onreadystatechange = function () {

if (this.readyState == 4) {

if (this.status == 200) {
        if (this.responseText != null) {
            document.getElementById('message').innerHTML = this.responseText

        }
        else alert("Ошибка ajax Данные не получены")
        document.getElementById('warning').innerHTML = '<p>Ошибка ajax Данные не получены</p>';
    }

    document.getElementById('warning').innerHTML = this.statusText
}

}

request.send(params)
   function ajaxRequest() {

try {

var request = new XMLHttpRequest()

}

catch (e1) {

try {

request = new ActiveXObject("Msxml2.XMLHTTP")

}

catch (e2) {

try {

request = new ActiveXObject("Microsoft.XMLHTTP")

}

catch (e3) {

request = false

}

}

}

return request

♪

[yajahira]

Here. jQuery Okay.

setInterval(function () {
  $.post('send.php', {text: 'sens'});
}, 2000);

All right, for the record, compare the code.