// Copyright � 2005 ADevel.com ( https://adevel.com/ )
// Author: Kirill Chernyshov ( chk@adevel.com )
var ajaxIsIE = false;
var buttonClicked = null;
var am_loading='amodules3/img/loading.gif';
var am_notloading='amodules3/img/not_loading.gif';

/**
 *      success_handler = function(response_text, response_xml);
 *      error_handler = function();
 *
 */

// Calls success_handler() if src_url loaded successfully.
// Otherwise error_handler() if specified
// ajaxRequest
function aarq( src_url, success_handler, error_handler ){
        var req = null;

        if((!src_url) || (!success_handler))
                return false;

        if (window.XMLHttpRequest){
                req = new XMLHttpRequest();
        }else{
                if (window.ActiveXObject){
                        ajaxIsIE = true;
                        req = new ActiveXObject("Microsoft.XMLHTTP");
                }
        }
        if (req) {
                req.onreadystatechange = function(){
                        if (req.readyState == 4) {
                                try{
                                        if (req.status == 200) {
                                                success_handler(req.responseText, req.responseXML);
                                        } else {
                                                if(error_handler)
                                                        error_handler();
                                        }
                                }
                                finally{}
                        }
                };
                req.open('GET', src_url, true );
                req.send("");
        }
        return false;
}

//Submits the form with specified id using its 'method' and 'action' properties.
// submission url could be replaced with custom_url
// if form is submitted successfully, success_handler() will be called,
// on error - error_handler()
// If request returned the XML content and success_handler is not specified,
// the default XML parsed would be called (ajaxDefaultXMLParser)
// ajaxSubmitForm
function aasf( form_id, custom_url, success_handler, error_handler ){
        var req = null;
        var frm = document.getElementById( form_id );
        var url = '';
        var method = 'get';
        if ( !frm )
                return false;
        if( !custom_url ) {
                if(frm.action )
                        url = frm.action;
        }
        else{
                url = custom_url;
        }

        if( url == '' )
                return false;
        if( frm.method )
                method = frm.method;

        var params = aacp( form_id )+'&ajax_submit=true';

        if (window.XMLHttpRequest)
                req = new XMLHttpRequest();
        else {
                if (window.ActiveXObject){
                        ajaxIsIE = true;
                        req = new ActiveXObject("Microsoft.XMLHTTP");
                }
        }

        if (req) {
                req.onreadystatechange = function(){
                        if (req.readyState == 4) {
                                try{
                                        if (req.status == 200) {
                                                if(success_handler)
                                                {
                                                        success_handler(req.responseText, req.responseXML);
                                                }
                                                else{
                                                        if( req.responseXML )
                                                                aadp( req.responseXML );
                                                }
                                        } else {
                                                if(error_handler)
                                                        error_handler();
                                        }
                                }
                                finally{
                                        aaec( form_id );
                                }
                        }
                };

                if(method.toLowerCase() == 'get'){
                        req.open('get', url+'?'+params, true );
                        req.send('');
                }
                else{
                        req.open('post', url, true );
                        req.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
                        req.send(params);
                }
                aadc( form_id );
        }
        return true;
}

// the Default XML Response Parser
// XML must contail the toplevel item 'elements' that soud consist of
// subitems with html ids as tagnames. Every id tag may contain one
// of the following nodes:
// a) innerHTML;
// b) value;
// c) src;
// d) className;
// e) checked;
// This nodes specify the corresponding properties of the html element.
// ajaxDefaultXMLParser
function aadp( xml_response ){
        // TODO: just implement it ;)
        if(!xml_response)
                return false;

        // go through item ids
        var _elements;
        try{_elements= xml_response.getElementsByTagName("elements")[0];}
                catch(e){return false;  }
        if( _elements ){
                var i, _src, _innerHTML, _value, _className, xml_item;
                for(i=0; i<_elements.childNodes.length; i++){
                        xml_item = _elements.childNodes[i];
                        html_item = document.getElementById( xml_item.nodeName );
                        if(html_item){
                                _src = xml_item.getElementsByTagName("src")[0];
                                if(_src)
                                        try{ html_item.src = aagn( null, 'src', xml_item, 0); }finally{}

                                _value = xml_item.getElementsByTagName("value")[0];
                                if(_value)
                                        try{ html_item.value = aagn( null, 'value', xml_item, 0); }finally{}

                                _innerHTML = xml_item.getElementsByTagName("innerHTML")[0];
                                if(_innerHTML)
                                        try{ html_item.innerHTML = aagn( null, 'innerHTML', xml_item, 0); }finally{}

                                _className = xml_item.getElementsByTagName("className")[0];
                                if(_className)
                                        try{ html_item.className = aagn( null, 'className', xml_item, 0); }finally{}

                                _checked = xml_item.getElementsByTagName("checked")[0];
                                if(_checked)
                                        try{ html_item.checked = aagn( null, 'checked', xml_item, 0); }finally{}
                        }
                }
        }

        return true;
}

// explicitly replaces the content of specified HTML element with result of requesting src_url
// ajaxSetContent
function aasn(element_id, src_url){
        var callback = function(response_text, response_xml){
                aafc( element_id, response_text);
        };
        return aarq(src_url, callback);
}

//not return HTML
function aacu(src_url){
        var callback = function(response_text, response_xml){};
        return aarq(src_url, callback);
}

// eSimilar to aasn, but replaces form field value
// ajaxSetValue
function aasv(element_id, src_url){
        var callback = function(response_text, response_xml){aafv( element_id, response_text);};
        return aarq( src_url, callback);
}


// represents form params as a string
// supports text, textarea, radiobuttons, select (not multiple), checkboxes..
// ajaxComposeParams
function aacp( form_id ){
        var j;
        var val;
        var elem;
        var res = '';
        if(!form_id)
                return res;
        var frm = document.getElementById( form_id );
        if(frm)
                for(var i=0; i<frm.elements.length; i++){
                        if(res != '')
                                res+='&';
                        if(frm.elements[i].type == 'checkbox'){
                                if(!frm.elements[i].checked)continue;
                        }
                        if(frm.elements[i].type == 'radio'){
                                elem = frm.elements[frm.elements[i].name];
                                val = 'null';
                                for(j=0; j < elem.length; j++){
                                        if(elem[j].checked)
                                                val = elem[j].value;
                                }
                                res+=frm.elements[i].name+'='+val;
                        }
                        else if(frm.elements[i].type == 'button'){
                                if(buttonClicked == frm.elements[i].name)res+=frm.elements[i].name+'=1';
                        }
                        else if(frm.elements[i].type == 'file'){
                                res+=frm.elements[i].name+'='+serializeJsToPhp(frm.elements[i].value);
                        }
                        else{
                                res+=frm.elements[i].name+'='+encodeURIComponent(frm.elements[i].value);
                        }
                }
        return res;
}
function isArray(obj) {
        if (obj.constructor.toString().indexOf("Array") == -1) {
                return false;
        } else {
                return true;
        }
}

function serializeJsToPhp(jsArray) {
        var arrayLength = jsArray.length;
        var phpString = "a:"+arrayLength+":{";

        for(var i=0; i<arrayLength; i++) {

                // prefix for integer based arrays
                phpString += "i:"+i;

                if(!isArray(jsArray[i])) {
                        phpString += ";s:"+jsArray[i].length+
                                                   ":\""+jsArray[i]+"\";";
                } else {
                        phpString += ";"+serializeJsToPhp(jsArray[i]);
                }
        }

        phpString += "}";
        return phpString;
}
// retrieves the content of XML item 'prefix:local[index]' of the parent item as a text.
// returns empty string on failure.
// getNodeText
function aagn(prefix, local, parentElem, index) {
        try{
                var res = "";
                if (prefix && ajaxIsIE) {
                        res = parentElem.getElementsByTagName(prefix + ":" + local)[index];
                } else {
                        res = parentElem.getElementsByTagName(local)[index];
                }
                if (res) {
                        if (res.childNodes.length > 1) {
                                return res.childNodes[1].nodeValue;
                        } else {
                                return res.firstChild.nodeValue;
                        }
                } else {
                        return "";
                }
        }
        catch(e){
                return "";
        }
}

// disables all elements of form
// disableControls
function aadc( form_id ){
        var frm = document.getElementById(form_id);
        if(frm)
                for(var i=0; i<frm.elements.length; i++){
                        frm.elements[i].prevenabled = frm.elements[i].disabled;
                        frm.elements[i].disabled = true;
                }
}

// enables all form elements
// enableControls
function aaec( form_id ){
        var frm = document.getElementById(form_id);
        if(frm)
                for(var i=0; i<frm.elements.length; i++){
                        frm.elements[i].disabled = frm.elements[i].prevenabled;
                }
}

// sets the innerHTML property of specified element
// fillContent
function aafc( elem_id, new_val){
        var res = false;
        try{
                var elem = document.getElementById(elem_id);
                if (elem){
                        elem.innerHTML = new_val;
                        res = true;
                }
        }
        finally{}

        return res;
}

// sets the value property of form elemenet
// fillValue
function aafv( elem_id, new_val){
        var res = false;
        try{
                var elem = document.getElementById(elem_id);
                if (elem){
                        elem.value = new_val;
                        res = true;
                }
        }
        finally{}

        return res;
}
// gets the value of form element
// getValue
// camper@adevel.com
function aagv(form_id, elem_name){
        var res=false;
        try{
                if(!form_id){
                        res=document.getElementById(elem_name).value;
                }else{
                        form=document.getElementById(form_id);
                        if(form){
                                if(form.elements[elem_name].type=='checkbox')res=form.elements[elem_name].checked?1:0;
                                else res=form.elements[elem_name].value;
                        }
                }
        }
        finally{}
        return res;
}

// Get element by ID in all browsers
// jancha@adevel.com
function aagi( elem_id ){
        if(document.getElementById && document.getElementById(elem_id)) {
                return document.getElementById(elem_id);
        } else if (document.all && document.all(elem_id)) {
                return document.all(elem_id);
        } else if (document.layers && document.layers[elem_id]) {
                return document.layers[elem_id];
        } else {
                return false;
        }
}

function spinner_on(spinner, timeout){
        /* This function starts a spinning wheel */
        var s = document.getElementById(spinner);
        if(!s)return;
        if(s.src){
                /* seems to be img */
                s.src=am_loading;
        }else{
                s.innerHTML='<img src="'+am_loading+'" alt="loading">';
        }
        if(timeout == null)timeout=3000;
        if(timeout>0)setTimeout("spinner_off('"+spinner+"')",timeout);
}
function spinner_off(spinner){
        /* This function stops a spinning wheel */
        var s = document.getElementById(spinner);
        if(!s)return;
        if(s.src){
                /* seems to be img */
                s.src=am_notloading;
        }else{
                s.innerHTML='<img src="'+am_notloading+'" alt="loading">';
        }
}

function aaej(src_url, spinner, argument){
        if(spinner)spinner_on(spinner);
        var callback = function(response_text, response_xml){
                eval(response)
                aafc( element_id, response_text);
        };

        return aarq( src_url, callback);
}

function setVisibility(element,visible){
        var eltag = document.getElementById( element );
        if(!eltag)alert('No element by name "'+element+'"');
        eltag.style.display=visible?"block":"none";
}

function resetForm(form){
        var frm = document.getElementById(form);
        frm.reset()
}

function setFieldValue(form,field,value){
        var frm = document.getElementById(form);
        frm[form+"_"+field].value=value;
}

function setFormFocus(form,field){
        var frm = document.getElementById(form);
        frm[form+"_"+field].focus();
}


function submitForm(form,spinner){
        var callback = function(response_text, response_xml){
                if(response_text){
                        try {
//                              alert(response_text);
                                eval(response_text);
                        }catch(e){
                // checking if session is expired and login is requested
                re = /session is expired, relogin/;
                if (response_text.search(re)!=-1){
                        alert('Your session has expired. Please log in again.');
                        window.location='main.php';
                        return false;
                };
                                //while some browsers prevents popup we better use alert
                                w=window.open(null,null,'height=400,width=700,location=no,menubar=no,scrollbars=yes,status=no,titlebar=no,toolbar=no');
                                if(w){
                                        w.document.write('<h2>Error in AJAX response: '+e+'</h2>');
                                        w.document.write(response_text);
                                        w.document.write('<center><input type=button onclick="window.close()" value="Close"></center>');
                                }else{
                                        alert("Error in AJAX response: "+e+"\n"+response_text);
                                }
                                try{
                                        eval(response_text.substring(response_text.indexOf('//ajax_script_start'),response_text.lastIndexOf('//ajax_script_end')));
                                } catch(e) {
                                        if(w){
                                                w.document.write('<h2>Error in AJAX response: '+e+'</h2>');
                                                w.document.write(response_text);
                                                w.document.write('<center><input type=button onclick="window.close()" value="Close"></center>');
                                        }else{
                                                alert('Could not parse response. '+e);
                                        }
                                }
                        }
                } else {
                        alert("Warning: Empty response from server");
                }
                if(spinner)spinner_off(spinner);
        };
        return aasf(form,null,callback);
}

// Floating frames fix for IE6 <
function hideSelects(hide, cont_element) {
        if (!document.all) {
                return;
        }

        var selects = cont_element ? document.getElementById(cont_element).getElementsByTagName('select') : document.getElementsByTagName('select');

        for (var i = 0; i < selects.length; i++) {
                selects.item(i).style.display = (hide ? 'none' : 'inline');
        }
}

// Function for checking if IE6 fix is needed <
function IE6FixNeeded() {
        return (navigator.appName == 'Microsoft Internet Explorer') && (navigator.appVersion.indexOf('MSIE 6.') > -1);
}

// Called on hiding and showing floating frames <
function setFloatingFrame(name, show) {

        // Perform operation only if browser is IE 6 <
        if (IE6FixNeeded()) {
                if (show) {

                        // Setup body overflow property to hidden, in order to display floating frame in center of the page
                        // without sidebars <
                        document.body.style.overflow = 'hidden';

                        // Since IE6 also can't hide elements with position:absolute even with overflow = "hidden"
                        // if you are having some elements that are using position:absolute. add code here for changin
                        // position:absolute to position:relative or something else. This will be only when floating frame will be opened

                        // Hide all selects when floatign frame is active except the ones that are in floating
                        // frames since they appear above the floating frame and we dont want that <
                        hideSelects(true);
                        hideSelects(false, name + '_fr');

                        // Setup the positioning for the floating frame <
                        document.getElementById(name + '_bg').style.position = 'absolute';
                        document.getElementById(name + '_fr').style.position = 'absolute';

                        // Setup floatign frame sizes to current client size <
                        document.getElementById(name + '_bg').style.width = document.body.clientWidth + 'px';
                        document.getElementById(name + '_bg').style.height = document.body.clientHeight + 'px';
                        document.getElementById(name + '_fr').style.width = document.body.clientWidth + 'px';
                        document.getElementById(name + '_fr').style.height = document.body.clientHeight + 'px';

                        // Save the current active floating frame name for furture use by resizing and etc <
                        active_floating_frame = name;

                } else {

                        // Restore body overflow and selects <
                        document.body.style.overflow = '';

                        // Add code for putting back elements with postion:absolute to their original position .
                        // Look upper comments for more info

                        hideSelects(false);

                        // Unset the positioning for the floating frame <
                        document.getElementById(name + '_bg').style.position = '';
                        document.getElementById(name + '_fr').style.position = '';

                        // Unset floatin frame sizes <
                        document.getElementById(name + '_bg').style.width = '';
                        document.getElementById(name + '_bg').style.height = '';
                        document.getElementById(name + '_fr').style.width = '';
                        document.getElementById(name + '_fr').style.height = '';

                        // Clear active floating frame name <
                        active_floating_frame = undefined;
                }
        }
}

// Holds current opened floatign frame if broiwser is IE6 and is opened <
var active_floating_frame;

// Called when resizing the widnow in order to resize the floating frame <
function resizeFloatingFrames() {
        if (active_floating_frame != undefined) {
                setFloatingFrame(active_floating_frame, 1);
        }
}

// Setup window resizez for floating frames fix for IE6 <
window.onresize = resizeFloatingFrames;

// functions for AJAX file uploads using IFrame
var form_action;

function createIFrame() {
  var id = 'f' + Math.floor(Math.random() * 99999);
  var div = document.createElement('div');
  div.innerHTML = '<iframe style="display:none" src="about:blank" id="'+id+'" name="'+id+'" onload="sendComplete(\''+id+'\')"></iframe>';
  document.body.appendChild(div);
  return document.getElementById(id);
}

function submitUpload(form, url, spinner) {
	if (!document.createElement) return; // not supported
	if (typeof(form)=="string") form=document.getElementById(form);
	var frame=createIFrame();
	frame.onSendComplete = function() {
		// checking if there is error
		var doc=frame.contentDocument;
		if (!doc && frame.contentWindow) doc=frame.contentWindow.document;
		if (!doc) doc=window.frames[frame.id].document;
		if (!doc) return null;
		if (doc.location=="about:blank") return null;
		if (doc.XMLDocument) doc=doc.XMLDocument;
		// doc's first element contains either filesize or error message
		res=doc.documentElement.firstChild.nodeValue;
		if(res-0!=res){
			alert(doc.documentElement.firstChild.nodeValue);
		}else{
			form.setAttribute('action',form_action);
			submitForm(form.name,spinner);
		}
	};
	form.setAttribute('target', frame.id);
	// saving action, it will be returned on form submit
	form_action=form.getAttribute('action');
	form.setAttribute('action', url);
	form.submit();
}

function sendComplete(id) {
  var iframe=document.getElementById(id);
  if (iframe.onSendComplete && typeof(iframe.onSendComplete) == 'function') iframe.onSendComplete();
}