function txt2img(tag, cssClass, src) {
	var elmnts = document.getElementsByTagName(tag);
	for (var i = 0; i < elmnts.length; i++) {
		var node = elmnts[i];
		if (node.className != cssClass) {
			continue;
		}
		var img = new Image();
		img.src	= src + "?id=" + cssClass + "&text=" + node.innerHTML;
		img.alt = node.innerHTML;
		node.parentNode.replaceChild(img, node)		// For some odd reason, this reduces the elmnts.length by 1 (?!)
		i--;
	}
}

function windowpopup() {
	window.open('/popup.html', 'watjekrijgt', 'width=790,height=522,scrollbars=yes,status=no,toolbar=no,resizable=yes');
}