planetlab/includes/js/bsn.Ajax.js

   1 /**
   2  *  author:             Timothy Groves - http://www.brandspankingnew.net
   3  *      version:        1.0 - 2006-08-04
   4  *
   5  *      requires:       nothing
   6  *
   7  */
   8
   9 var useBSNns;
  10
  11 if (useBSNns)
  12 {
  13         if (typeof(bsn) == "undefined")
  14                 bsn = {}
  15         _bsn = bsn;
  16 }
  17 else
  18 {
  19         _bsn = this;
  20 }
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30 _bsn.Ajax = function ()
  31 {
  32         this.req = {};
  33         this.isIE = false;
  34 }
  35
  36
  37
  38 _bsn.Ajax.prototype.makeRequest = function (url, meth, onComp, onErr)
  39 {
  40
  41         if (meth != "POST")
  42                 meth = "GET";
  43
  44         this.onComplete = onComp;
  45         this.onError = onErr;
  46
  47         var pointer = this;
  48
  49         // branch for native XMLHttpRequest object
  50         if (window.XMLHttpRequest)
  51         {
  52                 this.req = new XMLHttpRequest();
  53                 this.req.onreadystatechange = function () { pointer.processReqChange() };
  54                 this.req.open("GET", url, true); //
  55                 this.req.send(null);
  56         // branch for IE/Windows ActiveX version
  57         }
  58         else if (window.ActiveXObject)
  59         {
  60                 this.req = new ActiveXObject("Microsoft.XMLHTTP");
  61                 if (this.req)
  62                 {
  63                         this.req.onreadystatechange = function () { pointer.processReqChange() };
  64                         this.req.open(meth, url, true);
  65                         this.req.send();
  66                 }
  67         }
  68 }
  69
  70
  71 _bsn.Ajax.prototype.processReqChange = function()
  72 {
  73
  74         // only if req shows "loaded"
  75         if (this.req.readyState == 4) {
  76                 // only if "OK"
  77                 if (this.req.status == 200)
  78                 {
  79                         this.onComplete( this.req );
  80                 } else {
  81                         this.onError( this.req.status );
  82                 }
  83         }
  84 }