var gp_ajax = new Array();

function gpX(inExec, inDest, inExtr, inType) {
    /*
        Used to execute ajax call, retrieve results and forward to appopriate processor
        inType = (f)unction, (d)iv [default]
        inExec = file to be executed to retrieve results
        inDest = destination location (div or function) to process response and/or display 
                    if blank then silent call - no post processing required
    */
    var x = gp_ajax.length;
    var vExec = inExec + '';
    var vDest = inDest + '';
    var vType = inType + '';
    var vExtr = inExtr + '';

    if (vType == '') { vType = 'D' }
    vType = vType.toUpperCase()

    if (vExec.length > 0 && vDest.length > 0) {
        gp_ajax[x] = new gpX2();
        gp_ajax[x].requestFile = inExec; // Specifying which file to execute
        gp_ajax[x].onCompletion = function() { gpX_resp(x, vDest, vExtr, vType) }; // Specify function that will be executed after file has been found
        gp_ajax[x].runAJAX(); 	// Execute AJAX function
    }

    return false;
}

function gpX_resp(x, inDest, inExtr, inType) {
    // Post routing of ajax response, if dest is blank then silent otherwise D, F
    var vDest = inDest + '';
    var vExtr = inExtr + '';
    var vType = inType + '';
    var vResp = gp_ajax[x].response;

    if (vDest.length > 0) {
        switch (vType) {
            case 'F': // call function passing response data
                window[vDest](vResp);
                break;
            default: // 'D' -- div inner html
                var vDiv = document.getElementById(vDest);
                if (vDiv != null) { vDiv.innerHTML = vResp; }
                if (vExtr == 'gpf') { gpf_setup(); }
                break;
        }
    }
}

function gpX2(file) {
    // (C) www.dhtmlgoodies.com, October 2005 (all code below unaltered, 20081104)
    //      -- added this.onFail function to notify of failed instantiation attempt (20081104)
    this.xmlhttp = null;

    this.resetData = function() {
        this.method = "POST";
        this.queryStringSeparator = "?";
        this.argumentSeparator = "&";
        this.URLString = "";
        this.encodeURIString = true;
        this.execute = false;
        this.element = null;
        this.elementObj = null;
        this.requestFile = file;
        this.vars = new Object();
        this.responseStatus = new Array(2);
    };

    this.resetFunctions = function() {
        this.onLoading = function() { };
        this.onLoaded = function() { };
        this.onInteractive = function() { };
        this.onCompletion = function() { };
        this.onError = function() { };
        this.onFail = function() { };
    };

    this.onFail = function() {
        // added 20081105
        alert ("Your browser does not support AJAX!\n\nPlease upgrade to the most current browser version to take full advantage of this site.");
    }

    this.reset = function() {
        this.resetFunctions();
        this.resetData();
    };

    this.createAJAX = function() {
        try {
            this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e1) {
            try {
                this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e2) {
                this.xmlhttp = null;
            }
        }

        if (!this.xmlhttp) {
            if (typeof XMLHttpRequest != "undefined") {
                this.xmlhttp = new XMLHttpRequest();
            } else {
                this.failed = true;
            }
        }
    };

    this.setVar = function(name, value) {
        this.vars[name] = Array(value, false);
    };

    this.encVar = function(name, value, returnvars) {
        if (true == returnvars) {
            return Array(encodeURIComponent(name), encodeURIComponent(value));
        } else {
            this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);
        }
    }

    this.processURLString = function(string, encode) {
        encoded = encodeURIComponent(this.argumentSeparator);
        regexp = new RegExp(this.argumentSeparator + "|" + encoded);
        varArray = string.split(regexp);
        for (i = 0; i < varArray.length; i++) {
            urlVars = varArray[i].split("=");
            if (true == encode) {
                this.encVar(urlVars[0], urlVars[1]);
            } else {
                this.setVar(urlVars[0], urlVars[1]);
            }
        }
    }

    this.createURLString = function(urlstring) {
        if (this.encodeURIString && this.URLString.length) {
            this.processURLString(this.URLString, true);
        }

        if (urlstring) {
            if (this.URLString.length) {
                this.URLString += this.argumentSeparator + urlstring;
            } else {
                this.URLString = urlstring;
            }
        }

        // prevents caching of URLString
        this.setVar("rndval", new Date().getTime());

        urlstringtemp = new Array();
        for (key in this.vars) {
            if (false == this.vars[key][1] && true == this.encodeURIString) {
                encoded = this.encVar(key, this.vars[key][0], true);
                delete this.vars[key];
                this.vars[encoded[0]] = Array(encoded[1], true);
                key = encoded[0];
            }

            urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];
        }
        if (urlstring) {
            this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);
        } else {
            this.URLString += urlstringtemp.join(this.argumentSeparator);
        }
    }

    this.runResponse = function() {
        eval(this.response);
    }

    this.runAJAX = function(urlstring) {
        if (this.failed) {
            this.onFail();
        } else {
            this.createURLString(urlstring);
            if (this.element) {
                this.elementObj = document.getElementById(this.element);
            }
            if (this.xmlhttp) {
                var self = this;
                if (this.method == "GET") {
                    totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;
                    this.xmlhttp.open(this.method, totalurlstring, true);
                } else {
                    this.xmlhttp.open(this.method, this.requestFile, true);
                    try {
                        this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")
                    } catch (e) { }
                }

                this.xmlhttp.onreadystatechange = function() {
                    switch (self.xmlhttp.readyState) {
                        case 1:
                            self.onLoading();
                            break;
                        case 2:
                            self.onLoaded();
                            break;
                        case 3:
                            self.onInteractive();
                            break;
                        case 4:
                            self.response = self.xmlhttp.responseText;
                            self.responseXML = self.xmlhttp.responseXML;
                            self.responseStatus[0] = self.xmlhttp.status;
                            self.responseStatus[1] = self.xmlhttp.statusText;

                            if (self.execute) {
                                self.runResponse();
                            }

                            if (self.elementObj) {
                                elemNodeName = self.elementObj.nodeName;
                                elemNodeName.toLowerCase();
                                if (elemNodeName == "input"
								|| elemNodeName == "select"
								|| elemNodeName == "option"
								|| elemNodeName == "textarea") {
                                    self.elementObj.value = self.response;
                                } else {
                                    self.elementObj.innerHTML = self.response;
                                }
                            }
                            if (self.responseStatus[0] == "200") {
                                self.onCompletion();
                            } else {
                                self.onError();
                            }

                            self.URLString = "";
                            break;
                    }
                };

                this.xmlhttp.send(this.URLString);
            }
        }
    };

    this.reset();
    this.createAJAX();
}