var type_xml = false;
var delete_id = '';

/* Switching Criteria */
function makeFaveXMLRequest(url, parameters) {
	type_xml = false;
	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		type_xml = new XMLHttpRequest();
		if (type_xml.overrideMimeType) {
			type_xml.overrideMimeType('text/plain');
		}
	} else if (window.ActiveXObject) { // IE
		try {
			type_xml = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				type_xml = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}
	if (!type_xml) {
		alert('Cannot make connection to server. Please upgrade or use a different browser.');
		return false;
	}
	type_xml.onreadystatechange = changeType;
	type_xml.open("POST", url, true);
	type_xml.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
	type_xml.setRequestHeader("Content-length", parameters.length);
	type_xml.setRequestHeader("Connection", "close");
	type_xml.send(parameters);
}

function changeType() {
	if (type_xml.readyState != 4) return false;
	if (type_xml.status != 200) return false;
	var text = type_xml.responseText;
	if (!text) return false;
	
	if (text == 'saved') {
		// Did the article get added?
		alert('This page has been saved to your profile!');
		//document.getElementById('save_to_profile').innerHTML = 'Saved!';
	} else if (text == 'existing')  {
		// Was the article not added?
		alert('This page is already saved to your profile.');
	} else if (text == 'deleted')  {
		// Was the article deleted?
		document.getElementById(delete_id).style.display = 'none';
	} else if (text == 'session')  {
		// Was the article not added?
		alert('Please log in before saving to your profile.');
	} else {
		// Did we have an error
		alert('We could not save to your profile. '+text);
	}
}

function saveArticle(type,id) {
	makeFaveXMLRequest('/', 'action=custom&swa=save_favorite&table='+type+'&id='+id);
}

function removeArticle(type,id) {
	makeFaveXMLRequest('/', 'action=custom&swa=remove_favorite&'+type+'_'+id+'=1');
	delete_id = 'li_'+type+'_'+id;
}