function embed_php(addr, divid) {
  var req;

  if (window.XMLHttpRequest) {
    req = new window.XMLHttpRequest();
  } else if (window.ActiveXObject) {
    req = new ActiveXObject("Microsoft.XMLHTTP");
  }

  if (req != undefined) {
    req.onreadystatechange = function() {loadDone(req, divid);};
    req.open("POST", addr, true);
    req.send("");
  }
}

function loadDone(req, divid) {
  if (req.readyState == 4) { // only if req is "loaded"

    var viddiv = document.getElementById(divid);

    if (req.status == 200) { // only if "OK"
      viddiv.innerHTML = req.responseText;
    }

    else {
      viddiv.innerHTML="Load Error "+ req.status + "\n" +req.statusText;
    }
  }
}