function setElementVisibility(id, bool) {
	var element = document.getElementById(id);
	if (element != null) {
	   if ( bool ) {element.style.display = ''}
	   else { element.style.display = 'none'}
	}
}


function ContactWijzeMailChanged(state) { 
	setElementVisibility("emailme", state);
	setElementVisibility("belme", false);
}

function ContactWijzeBelChanged(state) { 
	setElementVisibility("belme", state);
	setElementVisibility("emailme", false);
}