/* The variable objXMLHTTP will hold our new XMLHttpRequest object. */
var objXMLHTTP;
var ajaxCompat = false;
var isIE = false;
var requestUnderway = false;
var nextReturnHandler = '';
var objResponse = null;
var posX=0;
var posY=0;
//for testing!
// writes the ajax statuses into the ajax feedback div
var isWriteAjaxStatuses = true;
// opens the ajax request into a new window instead of sending it normally
var isOpenAjaxInNewWindow = false;
createAjaxReqObject();
/**
* function to create the ajax request object
*/
function createAjaxReqObject () {
//must set it to false otherwise IE and FF freaks out
objXMLHTTP = false;
if (window.XMLHttpRequest) {
//mozilla / safari / opera...
ajaxCompat = true;
objXMLHTTP = new XMLHttpRequest();
} else if (window.ActiveXObject) {
// IE/Windows ActiveX version
isIE = true;
ajaxCompat = true;
//objXMLHTTP = new ActiveXObject("Microsoft.XMLHTTP");
objXMLHTTP = eval("new A" + "ctiv" + "eX" + "Ob" + "ject('Micr" + "osoft.XM" + "LHTTP');");
}
}
/**
* very simple prinf substitute kind of function
* frist arg is the base, rest are the params
* params in the base str are marked as {1} and {2} and so on
*/
function printf () {
var num = arguments.length;
var oStr = arguments[0];
for (var i = 1; i < num; i++) {
var pattern = "\\{" + i + "\\}";
var re = new RegExp(pattern, "g");
oStr = oStr.replace(re, arguments[i]);
}
return oStr;
}
/**
* build an ajax req from parameters and submit it
* e - the event (to identify the coords)
* url - the url of the ajax request handler
* funcID - the system function ID to invoke
* returnHanlder - the js return hanlder function
* params - the parameters to attach to the request
* fields - comma separated field IDs. The field values will be read and attached to the request
*/
function submitAJAXreq( e, url, funcID, returnHandler, params, fields ) {
if ( !ajaxCompat || requestUnderway ) return;
if ( ! isOpenAjaxInNewWindow ) {
requestUnderway = true;
}
nextReturnHandler = returnHandler;
var url = url + '?_f=' + funcID + params;
url = addFields(url, fields);
//alert(url);
if ( isWriteAjaxStatuses ) {
getPosition(e);
document.getElementById('feedBackDiv').style.display = 'block';
document.getElementById('feedBackDiv').style.top = posY+'px';
document.getElementById('feedBackDiv').style.left = posX+'px';
document.getElementById('feedBackDiv').attributes['class'].nodeValue = "feedback warning";
document.getElementById('feedBackDiv').innerHTML = 'Please wait, request is running!';
}
//open in a new window instead of/besides handled by ajax - handy for testing
if ( isOpenAjaxInNewWindow ) {
window.open ( url, 'newwin' ); return;
} else {
if ( window.ActiveXObject ) {
createAjaxReqObject();
}
objXMLHTTP.open("POST", url, true);
objXMLHTTP.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
objXMLHTTP.onreadystatechange = ajaxResponseHandler;
objXMLHTTP.send('');
}
}
/*
* interrogate a DOM object (return its properties)
*/
function interrogate(what, htmlwise) {
var output = '';
for (var i in what) {
output += i + '\n';
if (htmlwise) {
output = output + '
';
}
}
return(output);
}
//------------------------------------
// ajax response handlers
//------------------------------------
/**
* a global level response handler doing checks and calling the actual function
*/
function ajaxResponseHandler () {
//alert ('readyState' + objXMLHTTP.readyState + 'status:' + objXMLHTTP.status);
if(objXMLHTTP.readyState == 4) {
if (objXMLHTTP.status != 200) {
//bad request
if ( isWriteAjaxStatuses ) {
document.getElementById('feedBackDiv').attributes['class'].nodeValue = "feedback error";
document.getElementById('feedBackDiv').innerHTML = 'Request failed. HTTP status='+ objXMLHTTP.status ;
}
} else {
//the request is ok...see the rest now
if ( isWriteAjaxStatuses ) {
document.getElementById('feedBackDiv').attributes['class'].nodeValue = "feedback actionok";
document.getElementById('feedBackDiv').innerHTML = 'Request successful...';
}
//check if the response format is in order
if ( objXMLHTTP.responseXML==null || objXMLHTTP.responseXML.documentElement==null || objXMLHTTP.responseXML.documentElement.firstChild==null) {
//something is amiss
if ( isWriteAjaxStatuses ) {
document.getElementById('feedBackDiv').attributes['class'].nodeValue = "feedback error";
}
if ( objXMLHTTP.responseXML==null ) {
if ( isWriteAjaxStatuses ) {
document.getElementById('feedBackDiv').innerHTML = 'ERROR: empty XML response';
}
} else if ( objXMLHTTP.responseXML.documentElement==null ) {
if ( isWriteAjaxStatuses ) {
document.getElementById('feedBackDiv').innerHTML = 'ERROR: malformed XML response, documentElement missing';
}
} else if ( objXMLHTTP.responseXML.documentElement.firstChild==null ) {
if ( isWriteAjaxStatuses ) {
document.getElementById('feedBackDiv').innerHTML = 'ERROR: malformed XML response, firstChild missing';
}
}
} else {
//all good, see the response
objResponse = objXMLHTTP.responseXML.documentElement;
var responsetype = objResponse.firstChild.tagName;
if ( responsetype=='error' ) {
//alert('error returned' + objResponse.getElementsByTagName('feedback')[0].firstChild.data );
if ( isWriteAjaxStatuses ) {
document.getElementById('feedBackDiv').attributes['class'].nodeValue = "feedback error";
}
errStr = objResponse.getElementsByTagName('feedback')[0].firstChild.data;
if ( isWriteAjaxStatuses ) {
document.getElementById('feedBackDiv').innerHTML = 'ERROR: ' + errStr;
}
} else if ( responsetype=='feedback' ) {
if ( isWriteAjaxStatuses ) {
document.getElementById('feedBackDiv').attributes['class'].nodeValue = "feedback actionok";
document.getElementById('feedBackDiv').innerHTML = responsetype +': '+ objResponse.getElementsByTagName('feedback')[0].firstChild.data;
}
} else {
document.getElementById('feedBackDiv').style.display = 'none';
//call the appropriate function
nextReturnHandler();
}
}
}
}
requestUnderway = false;
}
/**
* display a popup menu given back via ajax
*/
function arh_menubuild() {
if ( isWriteAjaxStatuses ) {
document.getElementById('feedBackDiv').innerHTML = "at the arh_menubuild" ;
}
requestUnderway = false;
nextReturnHandler = '';
//menu name in