/**
 * @author İsmail Perim <http://ismailperim.net> <ismailperim@gmail.com>
 * @copyright 2009 © İsmail Perim <http://ismailperim.net> <ismailperim@gmail.com>
 * @license Licensed under the GNU General Public License, version 2. 
 * @license the file http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
 * @version $Id: myjs-ajax.js  2009-12-29 01:30$
 **/


/**
 * Example Code :
 * MyJS().ajax('a.php','POST',
 *							{
 *								data:'p= veriş',
 *								encode:true,
 *								loading:function(){},
 *								success:function(yanit){MyJS('div#deneme').setHtml(yanit);}
 *							}
 **/
 
 
 
/**
 * MyJS Ajax Function
 * @param string url
 * @param string type
 * @return instanceof MyJS
 **/
MyJS.prototype.ajax = function (url, type, opts) {
    if (url != null && url != '' && (type == 'GET' || type == 'POST')) {
        var req = new AjaxRequestObject();
        if (req) {
            req.onreadystatechange = function () { };
            req.abort();
        }

        if (opts.encode) {
            var dataEncode = opts.data;
            var dataArray = dataEncode.split('&');
            opts.data = '';
            for (var i = 0; i < dataArray.length; i++) {
                var dataValue = dataArray[i].split('=');
                opts.data += dataValue[0] + '=' + encodeURIComponent(dataValue[1]);
                if (i < dataArray.length - 1) {
                    opts.data += '&';
                }
            }

        }

        if (type == 'GET') {
            url = url + '?' + opts.data;
        }
        req.onreadystatechange = function () {
            if (req.readyState == 1 || req.readyState == 2 || req.readyState == 3) {
                if (opts.loading != 'undefined') {
                    opts.loading();
                }
            } else if (req.readyState == 4 && req.status == 200) {
                if (opts.success != 'undefined') {
                    opts.success(req.responseText);
                }
            }
        }
        req.open(type, url, true);
        req.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
        if (type == 'POST') 
        {
            req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=iso-8859-9');
        }
        req.setRequestHeader("Content-length", opts.data.length);
        req.setRequestHeader("Connection", "close");
        if (type == 'POST') {
            req.send(opts.data);
        }
        else {
            req.send(null);
        }


    }
};



function AjaxRequestObject() 
{
   var ajax = false;
   
   
   try 
   {
     ajax = new ActiveXObject("Msxml2.XMLHTTP"); 
   } 
   catch(e)
   {
	   
      try 
      {
        ajax = new ActiveXObject("Microsoft.XMLHTTP");
      }
      catch(e) 
      {
        ajax = false;
      }

   }

   
   if ( !ajax && typeof XMLHttpRequest != 'undefined' ) 
   {
     try
     {
        ajax = new XMLHttpRequest();
     }
     catch(e) 
     {    
        ajax = false;
     }

   }


   if ( !ajax && window.createRequest ) 
   {
	 try
     {
        ajax = window.createRequest();
     }
     catch(e) 
     {  
        ajax = false;
     }

   }

	return ajax;
}