htdocs/javascript/ajax.js

   1 /***************************************************************************
   2  *  Copyright (C) 2003-2006 Polytechnique.org                              *
   3  *  http://opensource.polytechnique.org/                                   *
   4  *                                                                         *
   5  *  This program is free software; you can redistribute it and/or modify   *
   6  *  it under the terms of the GNU General Public License as published by   *
   7  *  the Free Software Foundation; either version 2 of the License, or      *
   8  *  (at your option) any later version.                                    *
   9  *                                                                         *
  10  *  This program is distributed in the hope that it will be useful,        *
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
  13  *  GNU General Public License for more details.                           *
  14  *                                                                         *
  15  *  You should have received a copy of the GNU General Public License      *
  16  *  along with this program; if not, write to the Free Software            *
  17  *  Foundation, Inc.,                                                      *
  18  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                *
  19  ***************************************************************************/
  20
  21 Ajax = {
  22     xml_client: null,
  23     init: false,
  24
  25     prepare_client: function()
  26     {
  27         if (!Ajax.init) {
  28             if (window.XMLHttpRequest) {
  29                 Ajax.xml_client = new XMLHttpRequest();
  30             } else if (window.ActiveXObject) {
  31                 try {
  32                     Ajax.xml_client = new ActiveXObject("Msxml2.XMLHTTP");
  33                 } catch (e) {
  34                     Ajax.xml_client = new ActiveXObject("Microsoft.XMLHTTP");
  35                 }
  36             }
  37             if (Ajax.xml_client == null) {
  38                 alert("Ton client ne supporte pas Ajax, nécessaire pour certaines fonctionalités de cette page");
  39             }
  40         }
  41         Ajax.init = true;
  42     },
  43
  44     update_html: function(obj, src)
  45     {
  46         Ajax.prepare_client();
  47         if (Ajax.xml_client == null) {
  48             return true;
  49         }
  50         Ajax.xml_client.abort();
  51         Ajax.xml_client.onreadystatechange = function()
  52             {
  53                 if(Ajax.xml_client.readyState == 4) {
  54                     if (Ajax.xml_client.status == 200) {
  55                         if (obj != null) {
  56                                 document.getElementById(obj).innerHTML = Ajax.xml_client.responseText;
  57                         }
  58                     } else if (Ajax.xml_client.status == 403) {
  59                         window.location.reload();
  60                     }
  61                 }
  62             };
  63         Ajax.xml_client.open ('GET', src, true);
  64         Ajax.xml_client.send (null);
  65         return false;
  66     }
  67 }
  68