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I’ll start off with a very basic technique of using Ajax with the responseXML (not responseText). responseXML basically means that the returned values is in an XML format. The other option would be to use responseText which in many cases would be the simplest method. But true Ajax uses XML (as the X in the name suggests).

OK, let’s dive right into some code.

First we want to create the XML HTTP Request Object (this is always required!)

var http = createRequestObject();

function createRequestObject() {
	// find the correct xmlHTTP, works with IE, FF and Opera
	var xmlhttp;
	try {
  	xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
  catch(e) {
    try {
    	xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
    }
    catch(e) {
    	xmlhttp=null;
    }
  }
  if(!xmlhttp&&typeof XMLHttpRequest!="undefined") {
  	xmlhttp=new XMLHttpRequest();
  }
	return  xmlhttp;
}
  

 

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