/* Version 09.11.16 */
Ajax=function(addrandomnumber, filetype)
{
	this.basedomain='http://'+location.hostname;
	this.filetype=(filetype!=undefined ? filetype : 'txt');
	this.addrandomnumber=(addrandomnumber!=undefined ? addrandomnumber : false);
	
	this.ajaxobj=false;
	if (window.ActiveXObject) // if IE
	{
		try{
			this.ajaxobj=new ActiveXObject("Msxml2.XMLHTTP");
		}catch (err)
		{
			try{
				this.ajaxobj=new ActiveXObject("Microsoft.XMLHTTP");
			}catch (err) {}
		}
	}
	else if (window.XMLHttpRequest) // if Mozilla, Safari etc
	{
		this.ajaxobj=new XMLHttpRequest();
		if (this.ajaxobj.overrideMimeType);
			this.ajaxobj.overrideMimeType(this.filetype=='xml' ? 'text/xml' : 'text/plain');
	}
}

Ajax.prototype.get=function(url, callbackfunc)
{
	if (this.addrandomnumber) // To stop IE caching
		var url=url+(url.indexOf('?')!= -1 ? '&' : '?')+"ts="+new Date().getTime();
	if (this.ajaxobj)
	{
		this.ajaxobj.onreadystatechange=callbackfunc;
		this.ajaxobj.open('GET', url, true);
		this.ajaxobj.send(null);
	}
}

Ajax.prototype.post=function(url, parameters, callbackfunc)
{
	if (this.ajaxobj)
	{
		this.ajaxobj.onreadystatechange = callbackfunc;
		this.ajaxobj.open('POST', url, true);
		this.ajaxobj.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		this.ajaxobj.setRequestHeader("Content-length", parameters.length);
		this.ajaxobj.setRequestHeader("Connection", "close");
		this.ajaxobj.send(parameters);
	}
}

Ajax.prototype.request=function(url, parameters, calltype, callbackfunc)
{
	if(calltype.toLowerCase()=='post')
		this.post(url, parameters, callbackfunc);
	else
		this.get(url+'?'+parameters, callbackfunc);
}

Ajax.prototype.ready=function()
{
	return (this.ajaxobj.readyState == 4);
}

Ajax.prototype.status=function()
{
	return (this.ajaxobj.status);
}

Ajax.prototype.header=function(header)
{
	return (this.ajaxobj.getResponseHeader(header));
}

Ajax.prototype.response=function()
{
	return (this.filetype=='txt' ? this.ajaxobj.responseText : this.ajaxobj.responseXml);
}

function handleAjaxForm(form, onsuccess, onfailure)
{
	var useAIM=false, ajax, params, resp;
	for(var i=0; i<form.elements.length; i++)
	{
		if(form.elements[i].type=='file')
			useAIM=true;
	}
	
	if(useAIM)
	{
		return AIM.submit(form,
		{
			onComplete: function(response)
			{
				resp=JSON.parse(response);
				if(resp.success)
				{
					if(!!onsuccess)
						onsuccess(resp);
				}
				else
				{
					if(!!onfailure)
						onfailure(resp);
					if(!!resp.msg)
						alert('Error: '+resp.msg);
				}
			}
		});
	}
	else
	{
		ajax=new Ajax(true, 'txt');
		
		params='';
		for(var i=0; i<form.elements.length; i++)
		{
			if(form.elements[i].name != '')
			{
				if(form.elements[i].type=='checkbox' || form.elements[i].type=='radio')
				{
					if(!form.elements[i].checked)
						continue;
				}
				if(form.elements[i].type=='select-multiple')
				{
					for(var j=0; j<form.elements[i].options.length; j++)
					{
						if(form.elements[i].options[j].selected)
							params+=escape(form.elements[i].name)+'='+escape(form.elements[i].options[j].value).replace(/\+/g, '%2B')+'&';
					}
					continue;
				}
				params += escape(form.elements[i].name)+'='+escape(form.elements[i].value).replace(/\+/g, '%2B')+'&';
			}
		}
		
		ajax.request(form.action, params, form.method, function()
		{
			if(ajax.ready())
			{
				if(ajax.status()==200)
				{
					try
					{
						resp=JSON.parse(ajax.response());
					}
					catch(err)
					{
						alert('Error parsing JSON: '+ajax.response());
					}
					
					if(!!resp)
					{
						if(resp.success)
						{
							if(!!onsuccess)
								onsuccess(resp);
						}
						else
						{
							if(!!onfailure)
								onfailure(resp);
						}
					}
				}
				else if(ajax.status() == 403 && !!ajax.header('Location'))
				{
					location.href=ajax.header('Location');
				}
				else if(ajax.status()!=0)
					alert('HTTP error '+ajax.status()+': '+resp);
			}
		});
	}
	
	return false;
}

/*
	AIM (AJAX IFrame Method) - Used for file uploads
*/
AIM = {
 
	frame : function(c) {
 
		var n = 'f' + Math.floor(Math.random() * 99999);
		var d = document.createElement('DIV');
		d.innerHTML = '<iframe style="display:none" src="about:blank" id="'+n+'" name="'+n+'" onload="AIM.loaded(\''+n+'\')"></iframe>';
		document.body.appendChild(d);
		
		var i = document.getElementById(n);
		if (c && typeof(c.onComplete) == 'function') {
			i.onComplete = c.onComplete;
		}
		
		return n;
	},
	
	form : function(f, name) {
		f.setAttribute('target', name);
	},
 
	submit : function(f, c) {
		AIM.form(f, AIM.frame(c));
		if (c && typeof(c.onStart) == 'function') {
			return c.onStart();
		} else {
			return true;
		}
	},
	
	loaded : function(id) 
	{
		var i = document.getElementById(id);
		if (i.contentDocument)
			var d = i.contentDocument;
		else if (i.contentWindow)
			var d = i.contentWindow.document;
		else 
			var d = window.frames[id].document;
		
		if (d.location.href == "about:blank") 
			return;
	
		if (typeof(i.onComplete) == 'function') 
			i.onComplete(d.body.innerHTML);
	}
}