function writeMailAddress(weergave){
	var links = "natuuradvies";
	var verbinding = String.fromCharCode(8*8);
	var rechts = "xs4all.nl";
	var compleet = links + verbinding + rechts;
	var args = writeMailAddress.arguments.length;
	if(args == 0){
		weergaveTxt = compleet;
	} else {
		weergaveTxt = weergave;
	}
	document.write("<a href=mailto:" + compleet + ">" + weergaveTxt + "</a>");
}

function isIE(){
	if(navigator.appName.indexOf("Microsoft") > -1){
		return true;
	} 	else {
		return false;
	}
}

function writeWhiteBow() {
	if(isIE()){
		return;
	} 	else {
		document.write('<img src="../scripts/images/interface/witteboog.png" />');
	}
}

function writeTopBar(){
	/*document.write('<div id="bow">');
	if(!isIE()){
		document.write('<img src="../scripts/images/interface/witteboog.png" />');
	}
	document.write('</div>');
	document.write('<h1>Ecologisch Adviesbureau B. Kruijsen</h1>');
	document.write('<img src="../scripts/'+imgLeft+'" alt="'+altLeft+'" width="416" height="121" class="titelfoto" />');
	document.write('<img src="../scripts/'+imgRight+'" alt="'+altRight+'" width="158" height="121" />');*/
	document.write('<img src="gfx/titelfoto.jpg" alt="oever" width="418" height="121" /><img src="gfx/lijnenkaart.jpg" alt="kaart" width="158" height="121" />');
}

function getSeason(){
	var datum = new Date();
	var mnd = datum.getMonth();
	var season;
	
	if(mnd < 3){
		season = 'w';
	} else if(mnd >= 3 && mnd < 6){
		season = 'l';
	} else if(mnd >= 6 && mnd < 9){
		season = 'z';
	} else {
		season = 'h';
	}
	return season;
}
	
function setSeasonBackground(){
	var backgroundImage = 'images/interface/actueelbg_' + getSeason() + '.jpg';
	
	if(!document.getElementById) return;
	
	var actueel = document.getElementById("actueel");
	actueel.style['backgroundImage'] = 'url('+backgroundImage+')';
	
}