function swap(wat) {
	if(document.getElementById(wat).style.display == "none") {
		document.getElementById(wat).style.display = "";
	} else {
		document.getElementById(wat).style.display = "none";
	}
	if(document.getElementById("img_"+wat).src == "http://www.ontour.nl/img/plus.gif") {
		document.getElementById("img_"+wat).src = "http://www.ontour.nl/img/min.gif";
	} else {
		document.getElementById("img_"+wat).src = "http://www.ontour.nl/img/plus.gif";
	}
}

function hide(wat) {
	document.getElementById(wat).style.display = "none";
	document.getElementById("img_"+wat).src = "http://www.ontour.nl/img/plus.gif";
}