XML HTTP Request. JavaScript에서 사용됨. 본 기술을 이용하는것을 통틀어 AJAX라고도 한다.

• http://jibbering.com/2002/4/httprequest.html

• http://jpspan.sourceforge.net/wiki/doku.php?id=javascript:xmlhttprequest

관련포스트

• XMLHttpRequest is becoming more and more popular

JavaScript sample

req = new XMLHttpRequest();
req.open("GET", url, true);
req.onreadystatechange = callback;
...

IE7 부터는 Firefox,Safari와 같은 Native Object로 구현.

• http://msdn.microsoft.com/workshop/author/dhtml/overview/aboutxmlhttp.asp

var xmlHttp = null;
if (window.XMLHttpRequest) {
  // If IE7, Mozilla, Safari, and so on: Use native object
  xmlHttp = new XMLHttpRequest();
}
else
{
  if (window.ActiveXObject) {
     // ...otherwise, use the ActiveX control for IE5.x and IE6
     xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
  }
}