// v12 - 2010.12.27
var aAjaxReqs = new Array(); // array of request objects
var singleXmlHttp = false;

function AjaxReq() {
    this.inUse = false;
    this.xmlHttp = false;
    try { // Create a boolean variable to check for a valid Microsoft Active-X instance
        this.xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); // If the javascript version is greater than 5
    } catch (e) {
        try { // If not, then try the older IE Active-X object
            this.xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        } catch (E) {
            this.xmlHttp = false; // Else we must be using a non-IE browser
        }
    }
    if (!this.xmlHttp && typeof XMLHttpRequest != 'undefined') { // If not IE, create a Javascript xmlhttp obj
        this.xmlHttp = new XMLHttpRequest();}
}

// Main Function to process an AJAX request
function processAjax(flagMultiRequest, getOrPost, serverPage, queryString, nodeNameForGraphic, responseTextHandlerFunction) {
    if (typeof flagMultiRequest            == 'undefined') {flagMultiRequest = true;}
    if (typeof responseTextHandlerFunction == 'undefined') {responseTextHandlerFunction = ajaxDefaultResponseTextHandler;}

    var index;
    var activeXmlHttp;
    if (flagMultiRequest) {
        index = -1;
        for (var i=0; i<aAjaxReqs.length; i++) {
            if (aAjaxReqs[i].inUse == false) {
                index = i; break;}
        }
        if (index == -1) {
            index = aAjaxReqs.length;
            aAjaxReqs[index] = new AjaxReq();
        }
        activeXmlHttp = aAjaxReqs[index];
    } else {
        if (!singleXmlHttp) {
            singleXmlHttp = new AjaxReq();
        }
        //if (singleXmlHttp.inUse) {  // do not abort - causes bug in FF
        //    singleXmlHttp.onreadystatechange = function () {}
        //    singleXmlHttp.abort();
        //}
        activeXmlHttp = singleXmlHttp;
        index = -1;
    }

    activeXmlHttp.inUse = true;
    activeXmlHttp.nodeNameForGraphic = nodeNameForGraphic;
    activeXmlHttp.responseTextHandler = responseTextHandlerFunction;
    showAjaxGraphic(nodeNameForGraphic, true);

    if (getOrPost == 'get') {
        if (activeXmlHttp.xmlHttp) {
            activeXmlHttp.xmlHttp.open('GET', serverPage + '?' + queryString);
            activeXmlHttp.xmlHttp.onreadystatechange = function () {ajaxOnReadyStateChangedHandler(index);}
            activeXmlHttp.xmlHttp.send(null);
            //if (window.XMLHttpRequest) {
            //    activeXmlHttp.xmlHttp.send(null); }
            //else if (window.ActiveXObject) {
            //    activeXmlHttp.xmlHttp.send(); }
        } else { // no ajax with this browser->use script object.  Can only do a GET
            activeXmlHttp.inUse = false;
            var newScript = document.createElement('script');
            newScript.src = serverPage + '?no_ajax=1&img_ajax=' + (nodeNameForGraphic ? nodeNameForGraphic : '') + '&' + queryString;
            newScript.type = "text/javascript";
            document.body.appendChild(newScript); // execute script
        }
    } else {
        if (activeXmlHttp.xmlHttp) {
            activeXmlHttp.xmlHttp.open('POST', serverPage, true);
            activeXmlHttp.xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
            activeXmlHttp.xmlHttp.onreadystatechange = function () {ajaxOnReadyStateChangedHandler(index);}
            activeXmlHttp.xmlHttp.send(queryString);
        }
    }
    return;
}
function showAjaxGraphic(nodeNameForGraphic, show) {
    if (typeof show == 'undefined') show = false;
    if (nodeNameForGraphic && document.getElementById(nodeNameForGraphic)) {
        var img = document.getElementById(nodeNameForGraphic);
        if (show) {
            if (img.width == '12') {
                img.src = "/images/ajax12.gif";
            } else {
                img.src = "/images/ajax16.gif";
            }
        } else {
            img.src = '/images/blank.gif';
        }
        //img.style.visibility = (show ? 'visible' : 'hidden');
    }
}

function ajaxOnReadyStateChangedHandler(index) {
    if (index == -1) {
        activeXmlHttp = singleXmlHttp;
    } else {
        activeXmlHttp = aAjaxReqs[index];
    }
    if (activeXmlHttp.xmlHttp.readyState == 4) {
        if (activeXmlHttp.xmlHttp.status == 200) {
            if (index == -1) { // for single req hide here because overridden requests will drop through with a status of zero
                showAjaxGraphic(activeXmlHttp.nodeNameForGraphic, false);
            }
            activeXmlHttp.responseTextHandler(activeXmlHttp.xmlHttp.responseText);
        }
        if (index != -1) {
            showAjaxGraphic(activeXmlHttp.nodeNameForGraphic, false);
        }
        activeXmlHttp.inUse = false;
    }
}
var debugAjaxResponseText;
function ajaxDefaultResponseTextHandler(responseText) {
    // responseText: requires JSON obj with properties like: elemName: obj{elemPropName: propValue}
    debugAjaxResponseText = responseText; // assign to a global
    if (responseText.length > 0) {
        var response = eval('(' + responseText + ')');
        for (var elem in response) {
          for (var prop in response[elem]) {
            elementName = elem.toString();
            if (elementName == 'js_var' || elementName == 'js_var_blank') {
              if (typeof window[prop] == 'undefined') window[prop] = new Object();
              if (typeof response[elem][prop] == 'object' && (elementName != 'js_var_blank' || !isEmpty(response[elem][prop]) ) ) { // arrays & function static vars
                  for (var subObj in response[elem][prop]) {
                    if (typeof window[prop][subObj] == 'undefined') window[prop][subObj] = new Object();
                    if (typeof response[elem][prop][subObj] == 'object' && (elementName != 'js_var_blank' || !isEmpty(response[elem][prop][subObj]) ) ) {
                        for (var subSubObj in response[elem][prop][subObj]) {
                          if (typeof window[prop][subObj][subSubObj] == 'undefined') window[prop][subObj][subSubObj] = new Object();
                          if (typeof response[elem][prop][subObj][subSubObj] == 'object' && (elementName != 'js_var_blank' || !isEmpty(response[elem][prop][subObj][subSubObj]) ) ) {
                              for (var subSubSubObj in response[elem][prop][subObj][subSubObj]) {
                                if (typeof window[prop][subObj][subSubObj][subSubSubObj] == 'undefined') window[prop][subObj][subSubObj][subSubSubObj] = new Object();
                                if (typeof response[elem][prop][subObj][subSubObj][subSubSubObj] == 'object' && (elementName != 'js_var_blank' || !isEmpty(response[elem][prop][subObj][subSubObj][subSubSubObj]) ) ) {
                                    for (var subSubSubSubObj in response[elem][prop][subObj][subSubObj][subSubSubObj]) {
                                      if (typeof window[prop][subObj][subSubObj][subSubSubObj][subSubSubSubObj] == 'undefined') window[prop][subObj][subSubObj][subSubSubObj][subSubSubSubObj] = new Object();
                                      if (typeof response[elem][prop][subObj][subSubObj][subSubSubObj][subSubSubSubObj] == 'object' && (elementName != 'js_var_blank' || !isEmpty(response[elem][prop][subObj][subSubObj][subSubSubObj][subSubSubSubObj]) ) ) {
                                          // shouldn't be any deeper
                                      } else window[prop][subObj][subSubObj][subSubSubObj][subSubSubSubObj] = response[elem][prop][subObj][subSubObj][subSubSubObj][subSubSubSubObj];
                                    }
                                } else window[prop][subObj][subSubObj][subSubSubObj] = response[elem][prop][subObj][subSubObj][subSubSubObj];
                              }
                          } else window[prop][subObj][subSubObj] = response[elem][prop][subObj][subSubObj];
                        }
                    } else window[prop][subObj] = response[elem][prop][subObj];
                  }
              } else { //if (elementName == 'js_var_del') delete window[prop];
                       //if (elementName == 'js_var_blank') window[prop] = new Object(); else
                       window[prop] = response[elem][prop];
              }
            }
          }
        }
        for (var elem in response) {
            for (var prop in response[elem]) {
                elementName = elem.toString();
                if (elementName == 'js_pre_func') {
                    var args = [];
                    for (var subObj in response[elem][prop]) {
                        args[args.length] = response[elem][prop][subObj];
                    }
                    window[prop].apply(null, args);
                }
            }
        }
        for (var elem in response) {
            for (var prop in response[elem]) {
                elementName = elem.toString();
                if (elementName != 'js_var' && elementName != 'js_var_blank' && elementName != 'js_pre_func' && elementName != 'js_post_func') {
                    var targetNodes;
                    if (elementName == 'body') targetNodes = [document.body];
                        else targetNodes = document.getElementsById(elementName);
                    if (targetNodes.length > 0) {
                        for (var i=0; i<targetNodes.length; i++) {
                            var targetNode = targetNodes[i];
                                        ///// This is an alternate solution to the bug in IE setting innerHTML of <SELECT> elements
                                        //if ( browserIsIE() && targetNode.nodeName.toLowerCase() == 'select' && prop=='innerHTML' ) {
                                        //    response[elem][prop] = '<option>truncatethis</option>' + response[elem][prop];
                                        //}
                                        //targetNode[prop] = response[elem][prop];
                                        //if ( browserIsIE() && targetNode.nodeName.toLowerCase() == 'select' && prop=='innerHTML' ) {
                                        //    targetNode.outerHTML = targetNode.outerHTML;
                                        //}
                            if ( (navigator.userAgent.indexOf("MSIE") != -1) && targetNode.nodeName.toLowerCase() == 'select' && prop=='innerHTML' ) {
                                select_innerHTML(targetNode, response[elem][prop]);
                            } else if (prop=='innerHTML') {
                                targetNode[prop] = response[elem][prop];
                            } else if (prop=='appendHTML') {
                                targetNode['innerHTML'] += response[elem][prop];
                            } else if (prop=='value') {
                                targetNode.value = response[elem][prop];
                            } else if (prop.substr(0,6)=='style.') {
                                targetNode['style'][prop.substr(6)] = response[elem][prop];
                            } else {
                                targetNode.setAttribute(prop, response[elem][prop]); //targetNode[prop] = response[elem][prop];
                            }
                        }
                    }
                }
            }
        }
        for (var elem in response) {
            for (var prop in response[elem]) {
                elementName = elem.toString();
                if (elementName == 'js_post_func' && window[prop]) {
                    var args = [];
                    for (var subObj in response[elem][prop]) {
                        args[args.length] = response[elem][prop][subObj];
                    }
                    window[prop].apply(null, args);
                }
            }
        }
    }
    debugAjaxResponseText = '';
}
function select_innerHTML(objeto,innerHTML){  // for bug in IE setting innerHTML of <SELECT> elements
    /******
    * select_innerHTML - corrige o bug do InnerHTML em selects no IE
    * Veja o problema em: http://support.microsoft.com/default.aspx?scid=kb;en-us;276228
    * Versão: 2.1 - 04/09/2007
    * Autor: Micox - Náiron José C. Guimarães - micoxjcg@yahoo.com.br
    * @objeto(tipo HTMLobject): o select a ser alterado
    * @innerHTML(tipo string): o novo valor do innerHTML
    *******/
    objeto.innerHTML = ""
    var selTemp = document.createElement("micoxselect")
    var opt;
    selTemp.id="micoxselect1"
    document.body.appendChild(selTemp)
    selTemp = document.getElementById("micoxselect1")
    selTemp.style.display="none"
    if(innerHTML.toLowerCase().indexOf("<option")<0){//se não é option eu converto
        innerHTML = "<option>" + innerHTML + "</option>"
    }
    innerHTML = innerHTML.toLowerCase().replace(/<option/g,"<span").replace(/<\/option/g,"</span")
    selTemp.innerHTML = innerHTML


    for(var i=0;i<selTemp.childNodes.length;i++){
        var spantemp = selTemp.childNodes[i];

        if(spantemp.tagName){
            opt = document.createElement("OPTION")

            if(document.all){ //IE
                objeto.add(opt)
            }else{
                objeto.appendChild(opt)
            }

            //getting attributes
            for(var j=0; j<spantemp.attributes.length ; j++){
                var attrName = spantemp.attributes[j].nodeName;
                var attrVal = spantemp.attributes[j].nodeValue;
                if(attrVal){
                    try{
                        opt.setAttribute(attrName,attrVal);
                        opt.setAttributeNode(spantemp.attributes[j].cloneNode(true));
                    }catch(e){}
                }
            }
            //getting styles
            if(spantemp.style){
                for(var y in spantemp.style){
                    try{opt.style[y] = spantemp.style[y];}catch(e){}
                }
            }
            //value and text
            opt.value = spantemp.getAttribute("value")
            opt.text = spantemp.innerHTML
            //IE
            opt.selected = spantemp.getAttribute('selected');
            opt.className = spantemp.className;
        }
    }
    document.body.removeChild(selTemp)
    selTemp = null
}
function ajaxSerializeForm(formName) {
    var frm = document.getElementById(formName);
    var els = frm.elements;
    var len = els.length;
    var queryString = "ajax_request=1";
    this.addField = function(name,value) {
        if (queryString.length>0) {
            queryString += "&"; }
        queryString += encodeURIComponent(name) + "=" + encodeURIComponent(value);
    };
    for (var i=0; i<len; i++) {
        var el = els[i];
        if (!el.disabled) {
            switch(el.type) {
                case 'text':
                case 'password':
                case 'hidden':
                case 'textarea':
                    this.addField(el.name,el.value); break;
                case 'select-one':
                    if (el.selectedIndex>=0) {
                        this.addField(el.name,el.options[el.selectedIndex].value); }
                    break;
                case 'select-multiple':
                    for (var j=0; j<el.options.length; j++) {
                        if (el.options[j].selected) {
                            this.addField(el.name,el.options[j].value); }
                    }
                    break;
                case 'checkbox':
                case 'radio':
                    if (el.checked) {
                        this.addField(el.name,el.value); }
                    break;
            }
        }
    }
    return queryString;
};