Ajax get remote article content code

Function $ (elementid) { //Gets the object
 if for the specified ID (document.getElementById) {
  return document.getElementById (ElementID);
 } else if (document.all) {
  return document.all[elementid];
 } else if (document.layers) {
  return document.layers[elementid];
 }
}

function XHR () {//Create XMLHttpRequest Object
var obj;
try{
obj = new XMLHttpRequest ();
}catch (e) {
var a=[' MSXML2. xmlhttp.5.0 ', ' MSXML2. xmlhttp.4.0 ', ' MSXML2. xmlhttp.3.0 ', ' MSXML2. XMLHTTP ', ' MICROSOFT. xmlhttp.1.0 ', ' MICROSOFT. XMLHTTP.1 ', ' MICROSOFT. XMLHTTP '];
for (Var i=0;i<a.length;i++) {
try{
obj = new ActiveXObject (A[i]);
Break
}catch (e) {}
}
}
return obj;
}

function Newslist (groupnum) {
$ ("Newslist"). InnerHTML = "&nbsp;&nbsp;<font color=" Black ' > Load title ..., please ......</font> later.

var oajax = XHR ();

if (Oajax) {
Oajax.open ("Post", "ajax_example.asp?") show= "+groupnum+" &flag= "+math.random" (), true);

Oajax.setrequestheader ("Content-type", "application/x-www-form-urlencoded");
Oajax.send (NULL);
if (oajax.readystate = = 4) {
Showlist (Oajax.responsetext);
//  }
else {
Alert ("Get failed!") ")
//  }
Oajax.onreadystatechange = function () {
if (oajax.readystate = = 4) {
if (Oajax.status = = 200) {
Alert (Oajax.responsetext)
Showlist (Oajax.responsetext);
}
else {
Alert ("Get failed!") ")
}
}
}

}
}