+ this.show(pageNum * this.currentNum);
+ }
+};
+
+/*
+********************************************************************************
+** AJAX HELPER CLASS ***********************************************************
+********************************************************************************
+*/
+var pzHttpRequest = function (url, errorHandler, cookieDomain) {
+ this.maxUrlLength = 2048;
+ this.request = null;
+ this.url = url;
+ this.errorHandler = errorHandler || null;
+ this.async = true;
+ this.requestHeaders = {};
+ this.isXDR = false;
+ this.domainRegex = /https?:\/\/([^:/]+).*/;
+ this.cookieDomain = cookieDomain || null;
+
+ var xhr = new XMLHttpRequest();
+ var domain = this._getDomainFromUrl(url);
+ if ("withCredentials" in xhr) {
+ // XHR for Chrome/Firefox/Opera/Safari.
+ } else if (domain && this._isCrossDomain(domain) &&
+ typeof XDomainRequest != "undefined") {
+ // use XDR (IE7/8) when no other way
+ xhr = new XDomainRequest();
+ this.isXDR = true;
+ } else {
+ // CORS not supported.
+ }
+ this.request = xhr;
+};
+
+
+pzHttpRequest.prototype =
+{
+ safeGet: function ( params, callback )
+ {
+ var encodedParams = this.encodeParams(params);
+ var url = this._urlAppendParams(encodedParams);
+ if (url.length >= this.maxUrlLength) {
+ this.requestHeaders["Content-Type"]
+ = "application/x-www-form-urlencoded";
+ this._send( 'POST', this.url, encodedParams, callback );
+ } else {
+ this._send( 'GET', url, '', callback );
+ }
+ },
+
+ get: function ( params, callback )
+ {
+ this._send( 'GET', this._urlAppendParams(this.encodeParams(params)),
+ '', callback );
+ },
+
+ post: function ( params, data, callback )
+ {
+ this._send( 'POST', this._urlAppendParams(this.encodeParams(params)),
+ data, callback );
+ },
+
+ load: function ()
+ {
+ this.async = false;
+ this.request.open( 'GET', this.url, this.async );
+ this.request.send('');
+ if ( this.request.status == 200 )
+ return this.request.responseXML;
+ },
+
+ encodeParams: function (params)
+ {
+ var sep = "";
+ var encoded = "";
+ for (var key in params) {
+ if (params[key] != null) {
+ encoded += sep + key + '=' + encodeURIComponent(params[key]);
+ sep = '&';
+ }
+ }
+ return encoded;
+ },
+
+ _getDomainFromUrl: function (url)
+ {
+ if (this.cookieDomain) return this.cookieDomain; //explicit cookie domain
+ var m = this.domainRegex.exec(url);
+ return (m && m.length > 1) ? m[1] : null;
+ },
+
+ _strEndsWith: function (str, suffix)
+ {
+ return str.indexOf(suffix, str.length - suffix.length) !== -1;
+ },
+
+ _isCrossDomain: function (domain)
+ {
+ if (this.cookieDomain) return true; //assume xdomain is cookie domain set
+ return !this._strEndsWith(domain, document.domain);
+ },
+
+ getCookie: function (sKey) {
+ return decodeURI(document.cookie.replace(new RegExp("(?:(?:^|.*;)\\s*"
+ + encodeURI(sKey).replace(/[\-\.\+\*]/g, "\\$&")
+ + "\\s*\\=\\s*([^;]*).*$)|^.*$"), "$1")) || null;
+ },
+
+ setCookie: function (sKey, sValue, vEnd, sPath, sDomain, bSecure) {
+ if (!sKey || /^(?:expires|max\-age|path|domain|secure)$/i.test(sKey)) {
+ return false;
+ }
+ var sExpires = "";
+ if (vEnd) {
+ switch (vEnd.constructor) {
+ case Number:
+ sExpires = vEnd === Infinity
+ ? "; expires=Fri, 31 Dec 9999 23:59:59 GMT"
+ : "; max-age=" + vEnd;
+ break;
+ case String:
+ sExpires = "; expires=" + vEnd;
+ break;
+ case Date:
+ sExpires = "; expires=" + vEnd.toGMTString();
+ break;
+ }
+ }
+ document.cookie = encodeURI(sKey) + "=" + encodeURI(sValue)
+ + sExpires
+ + (sDomain ? "; domain=" + sDomain : "")
+ + (sPath ? "; path=" + sPath : "")
+ + (bSecure ? "; secure" : "");
+ return true;
+ },
+
+ _send: function ( type, url, data, callback)
+ {
+ var context = this;
+ this.callback = callback;
+ this.async = true;
+ //we never do withCredentials, so if it's CORS and we have
+ //session cookie, resend it
+ var domain = this._getDomainFromUrl(url);
+ if (domain && this._isCrossDomain(domain) &&
+ this.getCookie(domain+":SESSID")) {
+ //rewrite the URL
+ var sessparam = ';jsessionid=' + this.getCookie(domain+":SESSID");
+ var q = url.indexOf('?');
+ if (q == -1) {
+ url += sessparam;
+ } else {
+ url = url.substring(0, q) + sessparam + url.substring(q);
+ }
+ }
+ this.request.open( type, url, this.async );
+ if (!this.isXDR) {
+ //setting headers is only allowed with XHR
+ for (var key in this.requestHeaders)
+ this.request.setRequestHeader(key, this.requestHeaders[key]);
+ }
+ if (this.isXDR) {
+ this.request.onload = function () {
+ //fake XHR props
+ context.request.status = 200;
+ context.request.readyState = 4;
+ //handle
+ context._handleResponse(url);
+ }
+ this.request.onerror = function () {
+ //fake XHR props
+ context.request.status = 417; //not really, but what can we do
+ context.request.readyState = 4;
+ //handle
+ context._handleResponse(url);
+ }
+ } else {
+ this.request.onreadystatechange = function () {
+ context._handleResponse(url); /// url used ONLY for error reporting
+ }
+ }
+ this.request.send(data);
+ },
+
+ _urlAppendParams: function (encodedParams)
+ {
+ if (encodedParams)
+ return this.url + "?" + encodedParams;
+ else
+ return this.url;
+ },
+
+ _handleResponse: function (requestUrl)
+ {
+ if ( this.request.readyState == 4 ) {
+ // pick up appplication errors first
+ var errNode = null;
+ // xdomainreq does not have responseXML
+ if (this.isXDR) {
+ if (this.request.contentType.match(/\/xml/)){
+ var dom = new ActiveXObject('Microsoft.XMLDOM');
+ dom.async = false;
+ dom.loadXML(this.request.responseText);
+ this.request.responseXML = dom;
+ } else {
+ this.request.responseXML = null;
+ }
+ }
+ if (this.request.responseXML &&
+ (errNode = this.request.responseXML.documentElement)
+ && errNode.nodeName == 'error') {
+ var errMsg = errNode.getAttribute("msg");
+ var errCode = errNode.getAttribute("code");
+ var errAddInfo = '';
+ if (errNode.childNodes.length)
+ errAddInfo = ': ' + errNode.childNodes[0].nodeValue;
+
+ var err = new Error(errMsg + errAddInfo);
+ err.code = errCode;
+
+ if (this.errorHandler) {
+ this.errorHandler(err);
+ }
+ else {
+ throw err;
+ }
+ }
+ else if (this.request.status == 200 &&
+ this.request.responseXML === null) {
+ if (this.request.responseText !== null) {
+ //assume JSON
+ var json = null;
+ var text = this.request.responseText;
+ if (typeof window.JSON == "undefined") {
+ json = eval("(" + text + ")");
+ } else {
+ try {
+ json = JSON.parse(text);
+ } catch (e) {
+ }
+ }
+ this.callback(json, "json");
+ } else {
+ var err = new Error("XML/Text response is empty but no error " +
+ "for " + requestUrl);
+ err.code = -1;
+ if (this.errorHandler) {
+ this.errorHandler(err);
+ } else {
+ throw err;
+ }
+ }
+ } else if (this.request.status == 200) {
+ //set cookie manually only if cross-domain
+ var domain = this._getDomainFromUrl(requestUrl);
+ if (domain && this._isCrossDomain(domain)) {
+ var jsessionId = this.request.responseXML
+ .documentElement.getAttribute('jsessionId');
+ if (jsessionId)
+ this.setCookie(domain+":SESSID", jsessionId);
+ }
+ this.callback(this.request.responseXML);
+ } else {
+ var err = new Error("HTTP response not OK: "
+ + this.request.status + " - "
+ + this.request.statusText );
+ err.code = '00' + this.request.status;
+ if (this.errorHandler) {
+ this.errorHandler(err);
+ }
+ else {
+ throw err;
+ }
+ }
+ }