function nl_show(pve) {
	document.getElementById('kaart').style.backgroundImage = 'url(templates/img/kaart/' + pve + '.gif)';
}

function nl_hide() {
	document.getElementById('kaart').style.background = '#fff';
}

/**
 * hide
 */
function hide(e) {
  e.style.visibility = 'hidden';
  e.style.display = 'none';
}

/**
 * show
 */
function show(e) {
  e.style.visibility = 'visible';
  e.style.display = 'block';
}

/**
 * toggle_visibility
 */
function toggle_visibility(e) {
	if ( e.style.display == 'none' ||  e.style.display == '' ) show(e);
	else hide(e);
}

function popup_kaart(pc) {
	win = window.open("popup_kaart.php?postcode=" + pc, "kaart", "resizable=no, scrollbars=no, width=600, height=400, top=50, left=50");
  win.focus();
  return false;
}