setInterval("messages()", 7000);
function messages(){
var body = "";

        if (window.XMLHttpRequest) { // Mozilla, Safari,...
			xmlhttp = new XMLHttpRequest();
            if (xmlhttp.overrideMimeType) {
                xmlhttp.overrideMimeType('text/xml');
                // See note below about this line
            }
        } else if (window.ActiveXObject) { // IE
            try {
                xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try {
                    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e) {}
            }
        }
        if (!xmlhttp) {
            alert('Seu browser não suporta AJAX.');
            return false;
        }
    xmlhttp.open("POST", "http://www.oquei.com.br/portal/tv_consulta.php?start=yes", true);
    xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=iso-8859-1");
    xmlhttp.setRequestHeader("Cache-Control", "no-store, no-cache, must-revalidate");
    xmlhttp.setRequestHeader("Cache-Control", "post-check=0, pre-check=0");
    xmlhttp.setRequestHeader("Pragma", "no-cache");
    xmlhttp.onreadystatechange = processReqChange;
    xmlhttp.send(null);

}
function processReqChange() {
    if (xmlhttp.readyState == 4) {
            if (xmlhttp.status == 200) {
                document.getElementById("texto").innerHTML = xmlhttp.responseText;
                document.getElementById("mensagem").value = document.getElementById("mensagem").value;
                } 
    }
}