Christofs Blog

if( ! window.XMLHttpRequest ) {
  // Browsers like e.g. Mozilla and Firefox have this already
  try {
	// MSIE Version 5 and above has an ActiveX component; MSIE 6 has a better one
	var lib = /MSIE 5/.test(navigator.userAgent) ? “Microsoft” : “Msxml2”;
	var test = new ActiveXObject(lib + “.XMLHTTP”);
	XMLHttpRequest = function() {
	  	  return new ActiveXObject(lib + “.XMLHTTP”);
	}
  } catch( ex ) {
	// either scripting of secure ActiveX components has been turned off or this isn’t MSIE.
	// This will need a Hack“
	XMLHttpRequest = function() {
  	  // Iframe Hack
	  var index = 1;
	  XMLHttpRequest = function() {
		this.readyState = 0;
		this.onreadystatechange = function() {};
		
	  	this._private = new Object();
  		this._private.iframe = document.createElement(’iframe’);
		index++;
		
		this._private.getFullUrl() {
		  var tmp = this.url;
		  var userpass = ‘’;
		  if( this.user ) {
			userpass = this._private.user;
			if( this.password )
			  userpass += ‘:’+this.password;
			tmp = tmp.split(’://’,2);
			tmp = tmp[0] + ‘://’ + userpass + ‘@’ + tmp[1];
		  }
		  return tmp;
		}
		
	  	this._private.sendPost = function(body) {
			var form = this._private.iframe.document.createElement(’form’);
			form.action = this._private.getFullUrl();
			form.method = this._private.method;
			form.encoding = ‘text/xml’;
			var input = this,_private.iframe.document.createElement(’input’);
			input.value = body;
			input.name = ‘XMLHttpRequestBody’
			form.appendChild(input);

			form.submit();
		}
		this._private.sendGet = function(body) {
		  var tmp = this._private.getFullUrl();
		  tmp += ‘?XMLHttpRequestBody=’+encodeURI(body);
		  this._private.iframe.src = tmp;
		}

		var getreadystatechangefunction = function(object) {
		  return function() {
			object.readystate = object._private.iframe.readyState;
			if( !object._private.aborted )
			  object.onreadystatechange();
		  }
		}

		var getloadedfunction = function(object) {
		  return function() {
			if( object._private.aborted ) {
			  object._private.aborted = false;
			} else {
			  object.responseText = object._private.iframe.innerText;
			  objetc.reponseXML = object._private.iframe.document;
			}
		  }
		} 
		this._private.iframe.attachEvent (”onreadystatechange“,getreadystatechangefunction(this));
		this._private.iframe.attachEvent (”onload“,getloadedfunction(this));
	  } 
	  XMLHttpRequest.prototype.open = function(method,url,assync,user,password) {
		this._private.method   = method;
		this._private.url      = url;
		this._private.assync   = assync;
		this._private.user     = user;
		this._private.password = password;

		this._private.aborted  = false;

		if( method.toLowerCase() == ”get“ )       this.send = this._private.sendGet;
		else if( method.toLowerCase() == ”post“ ) this.send = this._private.sendPost;
		else                                      this.send = function(body) {};
	  }
	  XMLHttpRequest.prototype.send = function(body) {} // this will be changedin open()
	  XMLHttpRequest.prototype.abort = function() { this._private.aborted = true; this._private.iframe.src = ”about:empty“ }

	  XMLHttpRequest.prototype.setRequestHeader = function(header,value) { this._private.requestHeader[header] = value; }
	  XMLHttpRequest.prototype.getResponseHeader = function(header)      { return this._private.responseHeader[header]; }
	  XMLHttpRequest.prototype.getAllResponseHeaders = function()        { return this._private.responseHeaderTxt; }
	  
  	  // not supportet - could find no way to simulate these
	  XMLHttpRequest.prototype.responseStream = false;
	  XMLHttpRequest.prototype.setRequestHeader = new Function;
	  XMLHttpRequest.prototype.getResponseHeader = new Function;
	  XMLHttpRequest.prototype.getAllResponseHeaders = new Function;

	}
  }
}
if( !DOMParser ) {
  function DOMParser() {};
  
  DOMParser.prototype.toString = function() {
	return ”[object DOMParser]“
  }
  
  try {
	var test = new ActiveXObject(”Microsoft.XMLDOM“);
	DOMParser.prototype.parseFromString = function(str, contentType) {
	  var xmlDocument = new ActiveXObject(”Microsoft.XMLDOM“);
	  xmlDocument.loadXML(str);
	  return xmlDocument;
	}
  } catch( ex ) {
	// this hack should hardly ever be needed
	DOMParser.prototype.parseFromString = function(str, contentType) {
	  var myparser = document.createElement(’iframe’);
	  myparser.document.open();
	  myparser.document.write(str);
	  myparser.document.close();
	  return myparser.document;
	}
  }
  // not supported
  DOMParser.prototype.parseFromStream = new Function;
  DOMParser.prototype.baseURI = ”";
}