try {
xmlhttp = new XMLHttpRequest();
} catch(ee) {
try{
xmlhttp = new ActiveXObject('Msxml2.XMLHTTP');
} catch(e) {
try{
xmlhttp = new ActiveXObject('Microsoft.XMLHTTP');
} catch(E) {
xmlhttp = false;
}
}
}
function carrega(_idContainer, _endereco){
xmlhttp.open('GET',_endereco,true);
xmlhttp.onreadystatechange=function() {

if (xmlhttp.readyState==4){
retorno=xmlhttp.responseText;
var tag_container = document.getElementById(_idContainer);
tag_container.innerHTML=retorno;

}
}
xmlhttp.send(null)
}