function kom() {
document.getElementById('vlaggen').style.display = "block";
document.getElementById('achtervlag').style.display = "block";
document.getElementById('left').style.display = "block";
document.getElementById('right').style.display = "block";
document.getElementById('bot').style.display = "block";
w = ((document.body.clientWidth / 2) + 235)+'px';
document.getElementById('achtervlag').style.left = w;
}
function weg() {
document.getElementById('vlaggen').style.display = "none";
document.getElementById('achtervlag').style.display = "none";
document.getElementById('left').style.display = "none";
document.getElementById('right').style.display = "none";
document.getElementById('bot').style.display = "none";
}
function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=500,height=300,left = 590,top = 375');");
}