function provincie(pro) {
		document.getElementById("noord-holland").style.display = "none";
		document.getElementById("zuid-holland").style.display = "none";
		document.getElementById("zeeland").style.display = "none";
		document.getElementById("noord-brabant").style.display = "none";
		document.getElementById("limburg").style.display = "none";
		document.getElementById("overijssel").style.display = "none";
		document.getElementById("utrecht").style.display = "none";
		document.getElementById("drenthe").style.display = "none";
		document.getElementById("friesland").style.display = "none";
		document.getElementById("groningen").style.display = "none";
		document.getElementById("flevoland").style.display = "none";
		document.getElementById("gelderland").style.display = "none";
		document.getElementById(pro).style.display = "block";
}