| /******************************************************************************* |
| * Copyright (c) 2006 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| |
| /** |
| * ajaxRequest is used to initiate a request for an xml page |
| * @param url the url of the requested page |
| * @param callback, a function with a single parameter of type dom |
| * @param errorCallback (optional), a parameterless function called if there is an error |
| */ |
| |
| function ajaxRequest(url, callback, errorCallback) { |
| var ajax_request= false; |
| |
| if (window.XMLHttpRequest) { // Mozilla, Safari, ... |
| ajax_request= new XMLHttpRequest(); |
| if (ajax_request.overrideMimeType) { |
| ajax_request.overrideMimeType('text/xml'); |
| } |
| } else if (window.ActiveXObject) { // IE |
| try { |
| ajax_request= new ActiveXObject("Msxml2.XMLHTTP"); |
| } catch (e) { |
| try { |
| ajax_request= new ActiveXObject("Microsoft.XMLHTTP"); |
| } catch (e) {} |
| } |
| } |
| |
| if (!ajax_request) { |
| // Unable to initiate the request |
| errorCallback(); |
| return; |
| } |
| |
| ajax_request.onreadystatechange = function() { ajaxStateChange(ajax_request, callback, errorCallback)}; |
| ajax_request.open('GET', url, true); |
| ajax_request.send(null); |
| |
| } |
| |
| function ajaxStateChange(ajax_request, callback, errorCallback) { |
| if (ajax_request.readyState == 4) { |
| if (ajax_request.status == 200) { |
| |
| if (callback) { |
| callback(ajax_request.responseXML); |
| } |
| } else { |
| if (errorCallback) { |
| errorCallback; |
| } |
| } |
| } |
| |
| } |
