function AjaxRequest(type, url, id)  
{
    // create Ajax-Objects
    this.request = null;
    this.browser = navigator.userAgent;
    this.ie      = (document.all)?1:0;
    this.opera   = (this.browser.search(/opera/i)   > 0)? 1 : 0;
    this.mozilla = (this.browser.search(/mozilla/i) > 0)? 1 : 0;
    this.IEXObjs = ["MSXML2.XMLHttp.5.0", "MSXML2.XMLHttp.4.0", "MSXML2.XMLHttp.3.0", "MSXML2.XMLHttp", "Microsoft.XMLHttp"];
    this.version = parseFloat(navigator.appVersion);

    this.myEncodeURIComponent = function(s)
    {
        return((encodeURIComponent)? encodeURIComponent(s) : escape(s));
    };
    
    this.trim = function(s)
    {
        return(s.replace (/^\s+/,'').replace(/\s+$/,''));
    };
    
    this.getRequestObject = function()
    {
        var req = null;

        try
        {
            req = new XMLHttpRequest();
        }
        catch(e) {}
        
        if (!req)
        {
            for (var i = 0; i < this.IEXObjs.length; i++)
            {
                try
                {
                    req = new ActiveXObject(this.IEXObjs[i]);
                    if (req != null) break;
                }
                catch (e) {}
            }
        }

        if (!req && window.createRequest) req = window.createRequest();
        return req;
    };
    
    this.formData = function(formname)
    {
        o = this.getNamedObj(formname);
        a = new Array();

        for (var i = 0; i < o.length; i++)
        {
            a[i] = new Object();
            switch (o.elements[i].type)
            {
                case "checkbox" :
             
                    a[i][o.elements[i].name] = (o.elements[i].checked?1:0);
                    break;
                    
                default :
                    
                    a[i][o.elements[i].name] = o.elements[i].value;
                    break;
            }
        }
       
        return(a);
    };
    
    this.arrayData = function()
    {
        a = new Array();
        for (var i = 0; i < arguments.length; i++) a[i] = arguments[i];
        return(a);
    };
    
    this.formatParams = function(aArgs)
    {
        var param = "";

        if (typeof(aArgs) == 'string')
        {
            part = aArgs.match(/(\S.+)\[(\w.+)\]/gi);
            if (part)
            {
                param += "&" + this.myEncodeURIComponent(RegExp.$1) + "=" + this.myEncodeURIComponent(RegExp.$2);
            }
            else if (aArgs.name)
            {
                param += "&" + aArgs.name + "=" + aArgs.value;
            }
            else
            {
                param += "&args[]=" + this.myEncodeURIComponent(aArgs);
            }  
        }
        else if (typeof(aArgs) == 'number')
        {
            param += "&param=" + aArgs;   
        }
        else if (typeof(aArgs) == 'object')
        {
            if (aArgs.elements == undefined)
            {
                param += "&" + aArgs.name + "=" + aArgs.value;
            }
            else
            {
                // scan form.inputs
                for (i = 0; i < aArgs.length; i++)
                {
                    if (aArgs.elements[i].name == "") continue;
                    param += "&" + aArgs.elements[i].name + "=" + aArgs.elements[i].value;
                }
            }
        }
        else
        {
            for (i = 0; i < aArgs.length; i++)
            {
                    part = aArgs[i].match(/(\S.+)\[(\w.+)\]/gi);
                    if (part)
                    {
                        param += "&" + this.myEncodeURIComponent(RegExp.$1) + "=" + this.myEncodeURIComponent(RegExp.$2);
                    }
                    else
                    {
                        param += "&args[]=" + this.myEncodeURIComponent(aArgs[i]);
                    }
            }
        }                      

        return(param);
    };
   
    function getFrameDoc(frameObj)
    {
        if (frameObj == null)
        {
            frameObj = top;
        }
        else
        if (typeof(frameObj) != "object")
        {
            frameObj = parent.frames[frameObj];
        }
                
        try
        {
            // For IE5.5 and IE6, Mozilla, ...
            content = frameObj.contentWindow.document;
        } 
        catch (e)
        {
            try
            {
                // For NS6
                content = frameObj.contentDocument.document; 
            } 
            catch (e)
            {
                try
                {
                    // IE 5
                    content = frameObj.document;
                }
                catch (e)
                {
                    return(0);
                }
            }
        }
        return(content);
    };
    
    function ext_include(sTarget, sFile)
    {
    	var tar = (sTarget == null)? document : parent.frame[sTarget];
        var oHead = tar.getElementsByTagName('head');
        var oScript = tar.createElement('script');
        oScript.type = 'text/javascript';
        oScript.src = sFile;
        oHead[0].appendChild(oScript);
    };
    
    function getDocObj(o, sId)
    {
        if (o == null) o = document;
        if (!sId) return null;

        var returnObj = o.getElementById(sId);

        if (!returnObj && document.all) 
        {
            returnObj = o.all[sId];
        }
        
        return returnObj;
    };
    
    function getObj(sId)
    {
        if (!sId) return null;

        var returnObj = document.getElementById(sId);
        
        if (!returnObj && document.all) 
        {
            returnObj = document.all[sId];
        }
        
        return returnObj;
    };
    
    // MPajax.getObj() get the Object for sId
    function getNamedObj(sName)
    {
        if (!sName) return null;

        var returnObj = document.getElementsByName(sName)[0];
        
        if (!returnObj && document.all) 
        {
            returnObj = document.all[sName];
        }
        
        return returnObj;
    };
    
    function putContent(ftarget, fid, content)
    {
        var t = (ftarget == null)? document : getFrameDoc(ftarget);
        
        if (fid == null)
        {
            t.body.innerHTML = content;
        }
        else
        {   
            getDocObj(t, fid).innerHTML = content;
        }
    };
    
    // process ajax request ----------------------------------------------------
    
    // Sends a XMLHttpRequest to call the specified PHP function on the server
    this.call = function(type, uri, id, aArgs, onready, wait)
    {   
        methode = type.toUpperCase();
        if (this.ie && this.version < 7 && type != "UPLOAD") methode = "ACTIVEX";
        uri += (uri.indexOf("?") == -1)? "?" : "&";
        uri += "rnd=" + Math.random();   
            
        switch(methode)
        {
            case "GET" :    // GET-Methode
                
                request.reqType = 0;            
                if (aArgs != null) uri += this.formatParams(aArgs);
                postdata = null;
                break;
                
            case "POST" : 
            
                request.reqType = 1;
                postdata = (aArgs != null)? this.formatParams(aArgs) : null;
                break;
            
            case "ACTIVEX" :
            
                if (aArgs != null) uri += this.formatParams(aArgs);
                postdata = null;
                break;
            
            case "UPLOAD" :
 
                // create dynamic iframe for upload if not exit
                if (this.ie && this.version < 7)
                {       
                    if ('undefined' == typeof("copyIframe"))
                    {
                        alert("CopyIframe Module nicht gefunden.\nUpload mittels Internet Explorer 6 nicht moeglich.\nDie Datei wird beim Speichern uebertragen.");
                        return;
                    }
                        
                    // dynamic creation of iframe for IE < 7
                    if ('undefined' == typeof(frames["ajaxuploadifr"]))
                    {
                        iframeHTML  = '\<iframe id="ajaxuploadifr" name="ajaxuploadifr" style="';
                        iframeHTML += 'border:0px;';
                        iframeHTML += 'width:0px;';
                        iframeHTML += 'height:0px;';
                        iframeHTML += '"><\/iframe>';
                        document.body.innerHTML += iframeHTML;
                    }
                            
                    // prepare form
                    aArgs.target = "ajaxuploadifr";             
                    aArgs.action = uri;
                    aArgs.submit();
                    window.copyIframe("ajaxuploadifr", id, 500);                 
                }               
                else
                {    
                    if ('undefined' == typeof(frames["ajaxuploadifr_noie"]))
                    {
                        var objBody    = document.getElementsByTagName('body');
                        var IframeElem = document.createElement('iframe');
                        IframeElem.setAttribute("name", "ajaxuploadifr_noie");
                        IframeElem.style.visibility = "hidden";
                        IframeElem.style.width  = "0px";
                        IframeElem.style.height = "0px";
                        IframeElem.style.border = "0px";
                        IframeElem.onload = function() { executeCode(frames["ajaxuploadifr_noie"].document.body.innerHTML, id); }
                        objBody[0].appendChild(IframeElem);  
                    }
                        
                    // set form target to iframe to get the "ajax response" and submit
                    aArgs.target = "ajaxuploadifr_noie";             
                    aArgs.action = uri;
                    aArgs.submit();
                }                    
                
                // execute wait function           
                if (wait != null) eval(wait);
                return(1);
                
            default:
            
                return(0); 
                break;
        }
        
        request.onreadystatechange = function()
        {
            if (request.readyState == 4) 
            {
                try
                {
                    if (request.status == 200)
                    {
                        executeCode(request.responseText, id);
                        if (onready != null) eval(onready);
                    }
                    else
                    {
                        request.abort();
                    }
                }
                catch (e)
                {
                    request.abort();
                }
            }
        }   

        if (wait != null) eval(wait);

        request.open(type, uri, true);
        if (methode == "POST") request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
        request.send(postdata);
    };
    

    // generate output ---------------------------------------------------------
    
    function getNextScript(c)
    {
        var res = {part: 0, rest: 0};

        var start = c.indexOf('<ajax');
        var end   = c.indexOf('</ajax>') + 7;
        res.part = c.substring(start, end);
        res.rest = c.substr(end);
        return res;    
    };
    
    function executeCode(reqdata, id)
    {
        var maxcmd = 10;
        var content = null;
        var part = reqdata.match(/\<body\>(.+)\<\/body\>/gi);
        var c = (part)? RegExp.$1 : reqdata;

        while (c.indexOf('<ajax') != -1 && maxcmd)
        {
            res = getNextScript(c);
            c = res.rest;
            res.part.search(/\<ajax\s*([\w|\s|=|\"]+)\>([\w|\s|\W|\r]*)\<\/ajax\>/i);
            maxcmd--;
            param   = RegExp.$1;
            content = RegExp.$2;
            
            x = param.search(/type\s*=\s*\"*(\w+)\"*/i);
            ax_type    = (x != -1)? RegExp.$1 : "js";
            x = param.search(/command\s*=\s*\"*(\w+)\"*/i);
            ax_command = (x != -1)? RegExp.$1 : "";
            x = param.search(/id\s*=\s*\"*(\w+)\"*/i);
            ax_id      = (x != -1)? RegExp.$1 : id;
            x = param.search(/target\s*=\s*\"*(\w+)\"*/i);
            ax_target  = (x != -1)? RegExp.$1 : null;
 
            switch (ax_type.toLowerCase())
            {
                case "json" : break;
                    
                case "html" : switch (ax_command.toLowerCase())
                              {
                                  case "replace" : 
                                         default : putContent(ax_target, ax_id, content); break;
                              }
                              break;
                    
                  case "js" : switch (ax_command.toLowerCase())
                              {
                                  case "include" : ext_include(ax_target, content);  break; 
                                  case "execute" :
                                         default : eval(content); break;
                              }
                              break;                        
                
                   default : break;
            }
        }
        
        if (maxcmd == 10)
        {
            document.getElementById(id).innerHTML = reqdata;
        }
    }
    
    // Program begin
    
    if (type == "IFRAME_UPDATE")
    {
        reqdata = frames['ajaxuploadifr'].document.body.innerHTML;
        c = this.getNextScript(reqdata);
        alert(c);    
        if (c != "") this.executeCode(c, id);
        return;
    }
    else if (url != null)
    {
        var request = this.getRequestObject();

        //additional params : params, onready, wait
        params  = (arguments.length > 3)? arguments[3] : null;
        onready = (arguments.length > 4)? arguments[4] : null;
        wait    = (arguments.length > 5)? arguments[5] : null;
        
        this.call(type, url, id, params, onready, wait);
    }
}

// ======== UPLOAD SUPPORT FUNCTIONS FOR IE6 VERSION ===========================

var object_tag = "ajax";

function trim(s)
{
    return(s.replace (/^\s+/,'').replace(/\s+$/,''));
};

function getNextScript(s)
{
    var c = s.replace("/\\r/g", "");
    c = c.replace("/\\n/g", "");
  
    var res = {tag:null, content:null, rest:null};
    var m1 = c.toLowerCase().indexOf("<"+object_tag);
    var m2 = c.toLowerCase().indexOf(">", m1 + 1 + object_tag.length);
    var m3 = c.toLowerCase().indexOf("</"+object_tag+">", m2 + 1);
    
    try
    {
        res.tag = trim(c.substring(m1, m2 + 1));
        res.content = trim(c.substring(m2 + 1, m3));
        res.rest = trim(c.substr(m3 + 3 + object_tag.length));
    }
    catch (err)
    {
        res = {tag:null, content:null, rest:null};
    }
  
    return res;    
};

function getTagValue(s, name, def)
{
    try
    {
      
        var m1 = s.toLowerCase().indexOf(name+'=') + name.length + 1;
        var m2a = s.toLowerCase().indexOf(' ', m1);
        var m2b = s.toLowerCase().indexOf('>', m1);
        var m2 = (m2a == -1)? m2b:m2a;
        var val = s.substring(m1, m2);
        val = val.replace (/^\"/,'').replace(/\"$/,'');
    }
    catch (err)
    {
        val = def;
    }
    return(val); 
};
    
function copyIframe(iframe_id, dest_id, interval)
{
    try 
    {   
        var from = frames[iframe_id].document.body;
        var to   = document.getElementById(dest_id);
               
        if (from.innerHTML != "")
        { 
            var d = getNextScript(from.innerHTML);
                
            while (d.content != "" && d.content != null)
            {
                obj_id   = getTagValue(d.tag, "id", "");
                obj_type = getTagValue(d.tag, "type", "");
//alert("id:"+obj_id+", type:"+obj_type+" ---> "+d.content);

                switch (obj_type)
                {
                    case "js"   : eval(d.content); break;
                    case "html" : 
                        default : document.getElementById(obj_id).innerHTML = d.content; break;
                }            
                    
                d = getNextScript(d.rest);
            }  
            from.innerHTML = "";
            interval = 0;
        }
    }
    catch (err)
    {
        setTimeout("copyIframe('"+iframe_id+"', '"+dest_id+"', '"+interval+"');", interval);
        return;
    }
    
    if (interval > 0) setTimeout("copyIframe('"+iframe_id+"', '"+dest_id+"', '"+interval+"');", interval);
};