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// ====== Simple Ajax Code Kit =======
// code by Gregory Wild-Smith (c)2005
// http://twilightuniverse.com
// If you use this code please keep this credit intact.
// A link or email would be nice, but is not required.
// v1.01
function sack(file){
this.AjaxFailedAlert = "Your browser doesn't support the extended functionality of this website, and therefore you have have an experience that differs from the intended one.\n";
this.requestFile = file;
this.method = "POST";
this.URLString = "";
this.encodeURIString = true;
this.execute = false;
this.onLoading = function() { };
this.onLoaded = function() { };
this.onInteractive = function() { };
this.onCompletion = function() { };
this.createAJAX = function() {
try {
this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (oc) {
this.xmlhttp = null;
}
}
if(!this.xmlhttp && typeof XMLHttpRequest != "undefined")
this.xmlhttp = new XMLHttpRequest();
if (!this.xmlhttp){
// no XMLHttpRequest support, so no AJAX.
this.failed = true;
}
};
this.encodeURLString = function(string){
varArray = string.split('&');
for (i = 0; i < varArray.length; i++){
urlVars = varArray[i].split('=');
if (urlVars[0].indexOf('amp;') != -1){
urlVars[0] = urlVars[0].substring(4);
}
urlVars[0] = encodeURIComponent(urlVars[0]);
urlVars[1] = encodeURIComponent(urlVars[1]);
varArray[i] = urlVars.join("=");
}
return varArray.join('&');
}
this.runResponse = function(){
eval(this.response);
}
this.runAJAX = function(urlstring){
if (urlstring){ this.URLString = urlstring; }
if (this.element) { this.elementObj = document.getElementById(this.element); }
if (this.xmlhttp) {
var self = this; // wierd fix for odd behavior where "this" wouldn't work in the readystate function.
this.xmlhttp.open(this.method, this.requestFile ,true);
if (this.method == "POST") { this.xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded') }
if (this.encodeURIString){ this.URLString = this.encodeURLString(this.URLString); }
this.xmlhttp.send(this.URLString);
this.xmlhttp.onreadystatechange = function() {
switch (self.xmlhttp.readyState){
case 1: // Loading.
self.onLoading();
break;
case 2: // Loaded.
self.onLoaded();
break;
case 3: // Interactive - is called every 4096 bytes.. pretty much just tells you it's downloading data.
self.onInteractive();
break;
case 4: // Completed.
self.response = self.xmlhttp.responseText
self.onCompletion();
if(self.execute){ self.runResponse(); }
if (self.elementObj) {
self.elementObj.innerHTML = self.response;
}
break;
}
};
}
};
this.createAJAX();
if(this.failed && this.AjaxFailedAlert){ alert(this.AjaxFailedAlert); }
}
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