var Tweeter = new Object();
Tweeter.callback = Tweeter.onResponse;

Tweeter.DeleteBlog = function(id)
{
	this.callback = this.onResponse;
	var gateway = 'service/gateway.php?action=remove-blog&id='+id;
	this.makeRequest(gateway);
}
Tweeter.UpdateBlog = function(id, url, name, category)
{
	this.callback = this.onResponse;
	var gateway = 'service/gateway.php?action=update-blog&id='+id+'&url='+escape(url)+'&name='+escape(name)+"&category="+category;
	this.makeRequest(gateway);
}
Tweeter.AddBlog = function(tid, url, name, category)
{
	this.callback = this.onResponse;
	var gateway = 'service/gateway.php?action=add-blog&tid='+tid+'&url='+escape(url)+'&name='+escape(name)+"&category="+category;
	this.makeRequest(gateway);
}

Tweeter.makeRequest = function(gateway)
{
	this.request = (window.XMLHttpRequest) ? new XMLHttpRequest(): new ActiveXObject("Microsoft.XMLHTTP"); 
	this.request.onreadystatechange = function() { Tweeter.checkReadyState(); };
	this.request.open('GET', gateway, true);
	this.request.send(gateway);
}
Tweeter.onResponse = function()
{
	if(this.request.responseText == 'rss error')
	{
		Tweeter.ThrowRSSError();
	}
	else
	{
		var _location = document.location.toString();
		var url = _location.split("#");
		document.location=url[0];
	}
}
Tweeter.onBlogAdded = function()
{
	if(this.request.responseText == 'rss error')
	{
		Tweeter.ThrowRSSError();
	}
	else
	{
		var _location = document.location.toString();
		var url = _location.split("#");
		document.location=url[0];
	}
}

Tweeter.ThrowRSSError = function()
{
	var div = document.createElement('div');
	div.id='error';
	div.onclick = function(){ this.style.display='none'; };
	div.innerHTML = 'Your RSS feed is not valid, please double-check the URL and try again.';
	document.getElementsByTagName('body')[0].appendChild(div);
}
	
Tweeter.checkReadyState = function()
{
	switch(this.request.readyState)
	{
		case 1: break;
		case 2: break;
		case 3: break;
		case 4:
			this.callback();
	}
}