/*|-----------------------------------------|*\ 
|#| AJAX Class Wrapper                      |#| 
|#| Created By Zero Tolerance               |#| 
|#| CVS$v1.0.2$                             |#| 
|#| (C) Inferno Technologies 2005 - 2006    |#| 
|#| All Rights Reserved                     |#| 
\*|-----------------------------------------|*/ 

// example usage: 
/* 
 AJAX = new _AJAX(true) 
 AJAX.onreadystatechange(myresponsefunction) 
 AJAX.send('var=hi&var2=hi2', 'POST', 'index.php') 
*/ 

/** 
    _ajax 
    Initiates class wrapper for AJAX 

    @param    _async    boolean        Determines if asynchronous is on or not

    @return     null 
*/ 

function _ajax(_async) 
{ 
    this.async   = _async 
    this.handler = null 
} 

/** 
    [_ajax]createhandler 
    Initiates xml http header request (handler) 

    @return        boolean        Returns true on success 
*/ 

_ajax.prototype.createhandler = function() 
{ 
    try 
    { 
        this.handler = new XMLHttpRequest 
        return this.handler.setRequestHeader ? true : false 
    } 
    catch(e) 
    { 
        try 
        { 
            this.handler = new ActiveXObject('Microsoft.XMLHTTP') 
            return true 
        } 
        catch (e) 
        { 
            return false 
        } 
    } 

    return false 
} 

/** 
    [_ajax]onreadystatechange 
    Sets trigger function to execute once request state changes

    @param    _func    Function    function to trigger 

    @return        boolean        Returns true on success 
*/ 

_ajax.prototype.onreadystatechange = function(_func) 
{ 
    if (this.handler == null) 
    { 
        if (!this.createhandler()) 
        { 
            return false 
        }         
    } 

    this.handler.onreadystatechange = _func 
    return true 
} 

/** 
    [_ajax]encode_datastream 
    Automatically encodes URI components 

    @param    _datastream    string        URI Components 
*/ 

_ajax.prototype.encode_datastream = function(_datastream) 
{ 
    _datastream = _datastream.split('&') 

    for (key in _datastream) 
    { 
        if (_datastream[key].toString().match(/=/)) 
        { 
            bits = _datastream[key].toString().split('=') 

            _datastream[key] = bits[0] + '=' + encodeURIComponent(bits[1]) 
        } 
    } 

    return _datastream.join('&') 
} 

/** 
    [_ajax]send 
    Sends the http xml request 

    @param    _datastream    string        Request data 
    @param    _type        string        Request type 
    @param    _file        string        Request file (index.php/index.cgi, etc...)

    @return            null 
*/ 

_ajax.prototype.send = function(_datastream, _type, _file) 
{ 

    if (!this.handler.readyState && !this.handler.readyState < 4) 
    { 
        _datastream = this.encode_datastream(_datastream) 
        this.handler.open(_type, _file + '?' + ((_type == 'GET')? _datastream : ''), this.async) 
        this.handler.send(_datastream) 
    }     
}