var div;

function abrirLink(pagina, divid){
div = divid;
try {
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch ( e ) {
try {
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch ( e ) {
xmlhttp = false;
}
}

if (!xmlhttp && typeof XMLHttpRequest != 'undefined' ) {
try {
xmlhttp = new XMLHttpRequest();
} catch ( e ) {
xmlhttp = false;
}
}

if (xmlhttp) {
xmlhttp.onreadystatechange = editarConteudo;
xmlhttp.open('GET', pagina, true);
xmlhttp.setRequestHeader('Content-Type','text/xml');
xmlhttp.setRequestHeader('encoding','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.send(null);
}
}

function editarConteudo(){
if ( xmlhttp.readyState == 4) {

if ( xmlhttp.status == 200) { 
document.getElementById("programacao").innerHTML = xmlhttp.responseText;
} else {
alert( "Problema: " + xmlhttp.statusText );
}

}
}