// AJAX3D3c.js  20061015


var xmlhttp = null;


// Helper function to perform request; 
// synchronous to keep it simple for now 

function sendXMLHttpRequest(url)
{
  if (xmlhttp == null) 
  {
    xmlhttp = createXMLHttpRequest();
  }
  xmlhttp.open("GET", url, false);
  xmlhttp.send("");
  return xmlhttp.responseText;
}

// Helper function to create XMLHttpRequest request
function createXMLHttpRequest()
{
  if ( window.XMLHttpRequest ) // IE7 and Ff
  {
  try { return new window.XMLHttpRequest(); } catch(e) {alert("window.XMLHttpRequest failed"+e.message);}
  }
  else // old IE
  {
  try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {}
  try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) {alert("Platform not supported"+e.message);}
  }
}

// IE7 XMLHttpRequest does not operate locally. 
// If you need local operation, either // use Firefox 
// for local testing (it runs locally using the same code) 
// or re-rig the script to use the old IE object. 
// A way to do this is the following: 
//   try { return new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) {}
//   try { return new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) {}
//   try { return new XMLHttpRequest(); } catch(e) {}
//   alert("XMLHttpRequest not supported");