// V3.01.A - http://www.openjs.com/scripts/jx/
// Formated for better reading plus some improvements
jx = {

// Create a xmlHttpRequest object - this is the constructor.
getHTTPObject : function() {
var http = false;
// Use IE's ActiveX items to load the file.
if (typeof ActiveXObject != 'undefined') {
try {
http = new ActiveXObject("Msxml2.XMLHTTP");
} catch (ex) {
try {
http = new ActiveXObject("Microsoft.XMLHTTP");
} catch (ex2) {
http = false;
}
}
} else if (window.XMLHttpRequest) {
// If ActiveX is not available, use the XMLHttpRequest of Firefox/Mozilla etc. to load the document.
try {
http = new XMLHttpRequest();
} catch (ex) {
http = false;
}
}
return http;
},

// Init function
init : function() {
return this.getHTTPObject();
},

// This function is called from the user's script. Arguments:
// url - The url to be called. Append all the arguments like this 'get_data.php?id=5&car=benz' and make sure they are escaped.
// callback - Function that must be called once the data is ready.
// format - The return type. Could be 'xml', 'json' or 'text' (default). If it is json, the string will be 'eval'ed before returning it.
// error - Function that must be called in case of error.
load : function (url, callback, format, error) {
//The XMLHttpRequest object is recreated at every call - to defeat Cache problem in IE.
var http = this.init();

if ((!http) || (!url)) {
return;
}

// Set default return type to 'text' if missing.
if (typeof format == 'undefined') {
format = "text";
}
format = format.toLowerCase();

// Kill the Cache problem in IE.
url += (url.indexOf("?") > 0 ? "&" : "?") + "random=" + new Date().getTime();

http.open("GET", url, true);

// Call a function when the state changes - this is the inline function.
http.onreadystatechange = function () {
// Ready State will be 4 when the document is loaded.
if (http.readyState == 4) {
if (http.status == 200) {
var result = "";
if (typeof http.responseText != 'undefined') {
result = http.responseText;
}

// If the return is in JSON format, eval the result before returning it.
if (format == "json" && result != "") {
// \n's in JSON string, when evaluated will create errors in IE.
result = result.replace(/[\n\r]/g,"");
result = eval('('+result+')');
}

// Give the data to the callback function.
if (typeof callback != 'undefined') {
callback.call(null, result);
}
} else {
// Call error function.
if (typeof error != 'undefined') {
error.call(null, http.status, http.statusText);
} else {
alert("Error processing request [" + url + "]! Response is " + http.status + " - " + http.statusText);
}
}
}
};

// Send request.
http.send(null);
}
};