function showSub(tag) {
	$("#sub_"+tag).show();
}

function makeRequest(url, tag) { 
	var http_request = false;
	
	
	if (window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
		if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
	} else if (window.ActiveXObject) {
		try {
			http_request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try {
				http_request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e) {}
		}
	}

	if (!http_request) {
		alert('Er kon geen verbinding worden gemaakt.\nProbeer het later nog eens.'); 
		return false;
	}

	http_request.onreadystatechange = function() { alertContents(http_request, tag); };
	http_request.open('GET', url, true);
	http_request.send(null);

}

function alertContents(http_request, tag) {

	if (http_request.readyState == 4) {
		if (http_request.status == 200) {
			var results = http_request.responseText;
			getObject(tag).innerHTML = results;
			if(tag == 'blokgroot') {
				Effect.toggle('blokgroot','blinddown');
			}			
		} else {
			alert('Niet alles ging goed.\nProbeer het nog eens.');
		}
	}

}

function getObject(name) {
	var ns4 = (document.layers) ? true : false;
	var w3c = (document.getElementById) ? true : false;
	var ie4 = (document.all) ? true : false;
	
	if (ns4) return eval('document.' + name);
	if (w3c) return document.getElementById(name);
	if (ie4) return eval('document.all.' + name);
	return false;
}


function popup(url, w, h) {
	window.open(url,'popup','height='+h+', width='+w+', menubar=no, status=yes, scrollbars=yes, resizable=yes, toolbar=yes, location=no');		
}

function updateRSS() {
	$.get("http://www.zonnekrachtcentrales.nl/synch_rss.php");
}