/* framework helper functions */
var xmlHttp;
function pAjaxCallMethod(pObj, pMethod, pParams, cbMethod){
	xmlHttp = getXMLRequester();
	sendRequest("ajaxHandler.php", "ajaxReq=true&pObject="+pObj+"&pMethod="+pMethod+"&pParams[]="+pParams+"&cbMethod="+cbMethod, 2);
}

function ax_setEvent(r){
	calObject.ac_setEvent(r);
}

function ax_activateDoor(r){
	calObject.activateDoor();
}


/* ajax framework start */
var IE = false;
/**
 * instantiates a new xmlhttprequest object
 *
 * @return xmlhttprequest object or false
 */
function getXMLRequester( )
{
    var xmlHttp = false;

    // try to create a new instance of the xmlhttprequest object
    try
    {
        // Internet Explorer
        if( window.ActiveXObject )
        {
            IE = true;
        	for( var i = 5; i; i-- )
            {
                try
                {
                    // loading of a newer version of msxml dll (msxml3 - msxml5) failed
                    // use fallback solution
                    // old style msxml version independent, deprecated
                    if( i == 2 )
                    {
                        xmlHttp = new ActiveXObject( "Microsoft.XMLHTTP" );
                    }
                    // try to use the latest msxml dll
                    else
                    {

                        xmlHttp = new ActiveXObject( "Msxml2.XMLHTTP." + i + ".0" );
                    }
                    break;
                }
                catch( excNotLoadable )
                {
                    xmlHttp = false;
                }
            }
        }
        // Mozilla, Opera und Safari
        else if( window.XMLHttpRequest )
        {
            xmlHttp = new XMLHttpRequest();
        }
    }
    // loading of xmlhttp object failed
    catch( excNotLoadable )
    {
        xmlHttp = false;
    }
    return xmlHttp ;
}



// constants
var REQUEST_GET        	= 0;
var REQUEST_POST        = 2;
var REQUEST_HEAD    	= 1;
var REQUEST_XML        	= 3;

/**
 * sends a http request to server
 *
 * @param strSource, String, datasource on server, e.g. data.php
 *
 * @param strData, String, data to send to server, optionally
 *
 * @param intType, Integer,request type, possible values: REQUEST_GET, REQUEST_POST, REQUEST_XML, REQUEST_HEAD default REQUEST_GET
 *
 * @param intID, Integer, ID of this request, will be given to registered event handler onreadystatechange', optionally
 *
 * @return String, request data or data source
 */
function sendRequest( strSource, strData, intType, intID )
{
    if( !strData )
        strData = '';

    // default type (0 = GET, 1 = xml, 2 = POST )
    if( isNaN( intType ) )
        intType = 0; // GET

    // previous request not finished yet, abort it before sending a new request
    if( xmlHttp && xmlHttp.readyState )
    {
        xmlHttp.abort( );
        xmlHttp = false;
    }

    // create a new instance of xmlhttprequest object
    // if it fails, return
    if( !xmlHttp )
    {
        xmlHttp = getXMLRequester( );
        if( !xmlHttp )
            return;
    }

    // parse query string
    if( intType != 1 && ( strData && strData.substr( 0, 1 ) == '&' || strData.substr( 0, 1 ) == '?' ) )
        strData = strData.substring( 1, strData.length );

    // data to send using POST
    var dataReturn = strData ? strData : strSource;

    switch( intType )
    {
        case 1:    // xml
            strData = "xml=" + strData;
        case 2: // POST
            // open the connection
            xmlHttp.open( "POST", strSource, true );
            xmlHttp.setRequestHeader("Method", "POST " + strSource + " HTTP/1.1");
            xmlHttp.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded' );
            xmlHttp.setRequestHeader( 'Content-length', strData.length );
            break;
        case 3: // HEAD
            // open the connection
            xmlHttp.open( "HEAD", strSource, true );
            strData = null;
            break;
        default: // GET
            // open the connection
            var strDataFile = strSource + (strData ? '?' + strData : '' );
            xmlHttp.open( "GET", strDataFile, true );
            strData = null;
    }

    // set onload data event-handler
    xmlHttp.onreadystatechange = new Function( "", "processResponse(" + intID + ")" );

    // send request to server
    xmlHttp.send( strData );    // param = POST data
}

/**
 * process the response data from server
 *
 * @param intID, Integer, ID of this response
 */
function processResponse( intID )
{
    // status 0 UNINITIALIZED open() has not been called yet.
    // status 1 LOADING send() has not been called yet.
    // status 2 LOADED send() has been called, headers and status are available.
    // status 3 INTERACTIVE Downloading, responseText holds the partial data.
    // status 4 COMPLETED Finished with all operations.
    switch( xmlHttp.readyState )
    {
        // uninitialized
        case 0:
        // loading
        case 1:
        // loaded
        case 2:
        // interactive
        case 3:
            break;
        // complete
        case 4:
            // check http status
            if( xmlHttp.status == 200 )    // success
            {
            	return processData( xmlHttp, intID );
            }
            // loading not successfull, e.g. page not available
            else
            {

                if( window.handleAJAXError )
                    handleAJAXError( xmlHttp, intID );
                else
                    alert( "ERROR\n HTTP status = " + xmlHttp.status + "\n" + xmlHttp.statusText ) ;
            }
    }

    return false;
}


// process data from server
function processData( xmlHttp, intID ){
    r = xmlHttp.responseText.replace(/^\s*|\s*$/g,"");

    if(IE == false){
    	var parser = new DOMParser();
    	xmlDoc = parser.parseFromString(r, "text/xml");
    }else{
    	xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
       	xmlDoc.loadXML(r);
    }

	var axFunction  = xmlDoc.getElementsByTagName("cbMethod")[0].firstChild.nodeValue;
	var axParams	= new Array();

	tmp 		= xmlDoc.getElementsByTagName("result");

	for(i=0; i < tmp.length; i++){
		axParams[i] = tmp[i].firstChild.nodeValue
	}

	try {
			var callback = eval(axFunction);
			callback(eval(axParams));

		} catch (e) {
			alert("Caught error " + e + ": Could not eval " + axParams );
		}
	return true;
}


// handle response errors
function handleAJAXError( xmlHttp, intID )
{

}