function set_maan_dagen(dagen){
	//alert(dagen);
	obj = document.getElementById("maan");
	child = document.createElement("font");
	if(dagen==0){
		child.innerHTML = "<br/>Vandaag is het volle maan.";
	}else{
		child.innerHTML = "<br/>De volgende volle maan is over "+dagen+" dagen.";
	}
	obj.appendChild(child);	
}
<!--
var InternetExplorer = navigator.appName.indexOf("Microsoft") != -1;
function maanfla_DoFSCommand (dagen, y){
	//var mynavscrollerObj = InternetExplorer ? maanfla : document.maanfla;
	var mynavscrollerObj = document.getElementById('maanfla')
	set_maan_dagen(dagen);
}
if (navigator.appName && navigator.appName.indexOf("Microsoft") != -1 &&   navigator.userAgent.indexOf("Windows") != -1 && navigator.userAgent.indexOf("Windows 3.1") == -1) {
  		document.write('<SCRIPT LANGUAGE=VBScript\> \n');
 		document.write('on error resume next \n');
  		document.write('Sub maanfla_FSCommand(ByVal command, ByVal args)\n');
  		document.write(' call maanfla_DoFSCommand(command, args)\n');
  		document.write('end sub\n');
  		document.write('</SCRIPT\> \n');
}
//-->