PowerJSLibs - Shorter faster code

ahah.js

/* Not mine: http://www.xfront.com/microformats/AHAH.html */
function ahah(url, target, delay) {
  var req;
  document.getElementById(target).innerHTML = 'waiting...';
  if (window.XMLHttpRequest) {
    req = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    req = new ActiveXObject("Microsoft.XMLHTTP");
  }
  if (req != undefined) {
    req.onreadystatechange = function() {ahahDone(req, url, target, delay);};
    req.open("GET", url, true);
    req.send("");
  }
}  

function ahahDone(req, url, target, delay) {
  if (req.readyState == 4) { // only if req is "loaded"
    if (req.status == 200) { // only if "OK"
      document.getElementById(target).innerHTML = req.responseText;
    } else {
      document.getElementById(target).innerHTML="ahah error:\n"+req.statusText;
    }
    if (delay != undefined) {
       setTimeout("ahah(url,target,delay)", delay); // resubmit after delay
      //server should ALSO delay before responding
    }
  }
}

editpage.js

/* Do whatever you like with this, a link to me is nice!  */
function valueById(id){
	x = document.getElementById(id).value;
  return(x);
};
function changevalueById(id,content){
  x = document.getElementById(id).value;
  x = content;
  return(x);
};
function contentByID(id){
  x = document.getElementById(id).innerHTML;
  return(x);
};
function changecontentById(id,content){
  x = document.getElementById(id).innerHTML;
  x = content;
  return(x);
};