// switch voor reisbeschrijvingen
function switch1(div) {
var option=['div_reis','div_xtra','div_data','div_prak','div_route','div_foto'];
for(var i=0; i<option.length; i++) {
if (document.getElementById(option[i])) {
obj=document.getElementById(option[i]);
obj.style.display=(option[i]==div)? "block" : "none";
}
}
}
window.onload=function () {switch1('div_reis');}