function menukaart(sUrl,x,y,titel) {
var w = x;
var h = y;
var l = (screen.width / 2) - (w / 2);
var t = (screen.height / 2) - (h / 2);
var options = 'directories=no,location=no,menubar=no,status=no,titlebar=no,toolbar=no,scrollbars=no,width='+w+',height='+h+',top='+t+',left='+l+',resizeable=no';
var win = window.open(sUrl,null,options);
win.document.writeln('Silva Ducis | '+titel+'');
win.document.writeln('');
win.document.writeln('
');
win.document.writeln('');
win.document.close();
win.focus();
}
function scherm(mylink, windowname){
if (! window.focus)return true;
var href;
if (typeof(mylink) == 'string')
href=mylink;
else
href=mylink.href;
window.open(href, windowname, 'width=310,height=647,scrollbars=no');
return false;
}