//V3.01.A - http://www.openjs.com/scripts/jx/
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 (e) {
                try { http = new ActiveXObject("Microsoft.XMLHTTP"); }
                catch (E) {
                    http = false;
                }
            }
            //If ActiveX is not available, use the XMLHttpRequest of Firefox/Mozilla etc. to load the document.
        } else if (window.XMLHttpRequest) {
            try { http = new XMLHttpRequest(); }
            catch (e) { http = false; }
        }
        return http;
    },
    // This function is called from the user's script. 
    //Arguments - 
    //	url	- The url of the serverside script that is to be called. Append all the arguments to 
    //			this url - eg. 'get_data.php?id=5&car=benz'
    //	callback - Function that must be called once the data is ready.
    //	format - The return type for this function. Could be 'xml','json' or 'text'. If it is json, 
    //			the string will be 'eval'ed before returning it. Default:'text'
    load: function(url, callback, format) {

        var http = this.init(); //The XMLHttpRequest object is recreated at every call - to defeat Cache problem in IE
        if (!http || !url) return;

        if (http.overrideMimeType) http.overrideMimeType('text/xml');

        if (!format) var format = "text"; //Default return type is 'text'
        format = format.toLowerCase();

        //Kill the Cache problem in IE.
        var now = "uid=" + new Date().getTime();
        url += (url.indexOf("?") + 1) ? "&" : "?";
        url += now;
        alertSomething(url);

        http.onreadystatechange = function() {//Call a function when the state changes.
            if (http.readyState == 4) {//Ready State will be 4 when the document is loaded.

                if (http.status == 200) {
                    alertSomething('Ajax status is: ' + http.status);
                    var result = "";
                    if (http.responseText) result = http.responseText;

                    //If the return is in JSON format, eval the result before returning it.
                    if (format.charAt(0) == "j") {
                        //\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 (callback) callback(result);
                } else {
                    //An error occured
                    //alertSomething( 'status: ' + http.status );
                    /*
                    if(error)
                    {	
                    error(http.status);
                    } 
                    */
                }
            }
        }
        http.open("GET", url, true);
        alertSomething("abierto");
        http.send(null);
    },
    init: function() { return this.getHTTPObject(); }
}