function reviews() {
if(document.getElementById('algemeen')) document.getElementById('algemeen').style.display='none';
if(document.getElementById('specificaties')) document.getElementById('specificaties').style.display='none';
if(document.getElementById('gerelateerd')) document.getElementById('gerelateerd').style.display='none';
if(document.getElementById('reviews')) document.getElementById('reviews').style.display='';
//if(document.getElementById('tab6')) document.getElementById('tab6').style.backgroundImage="url(<?php echo $domein.$map; ?>images/buttonactive.png)"; 
//if(document.getElementById('tab6')) document.getElementById('tab6').style.color="#000000"; 

if(document.getElementById('voor')) document.getElementById('voor').style.display='none';
if(document.getElementById('inst')) document.getElementById('inst').style.display='none';

}
function algemeen() {
if(document.getElementById('reviews')) document.getElementById('reviews').style.display='none';
if(document.getElementById('specificaties')) document.getElementById('specificaties').style.display='none';
if(document.getElementById('gerelateerd')) document.getElementById('gerelateerd').style.display='none';
if(document.getElementById('algemeen')) document.getElementById('algemeen').style.display='';
if(document.getElementById('voor')) document.getElementById('voor').style.display='none';
if(document.getElementById('inst')) document.getElementById('inst').style.display='none';
}
function specificaties() {
if(document.getElementById('algemeen')) document.getElementById('algemeen').style.display='none';
if(document.getElementById('reviews')) document.getElementById('reviews').style.display='none';
if(document.getElementById('gerelateerd')) document.getElementById('gerelateerd').style.display='none';
if(document.getElementById('specificaties')) document.getElementById('specificaties').style.display='';
if(document.getElementById('voor')) document.getElementById('voor').style.display='none';
if(document.getElementById('inst')) document.getElementById('inst').style.display='none';
}
function gerelateerd() {
if(document.getElementById('algemeen')) document.getElementById('algemeen').style.display='none';
if(document.getElementById('reviews')) document.getElementById('reviews').style.display='none';
if(document.getElementById('specificaties')) document.getElementById('specificaties').style.display='none';
if(document.getElementById('gerelateerd')) document.getElementById('gerelateerd').style.display='';
if(document.getElementById('voor')) document.getElementById('voor').style.display='none';
if(document.getElementById('inst')) document.getElementById('inst').style.display='none';
}
function voor() {
if(document.getElementById('reviews')) document.getElementById('reviews').style.display='none';
if(document.getElementById('specificaties')) document.getElementById('specificaties').style.display='none';
if(document.getElementById('gerelateerd')) document.getElementById('gerelateerd').style.display='none';
if(document.getElementById('algemeen')) document.getElementById('algemeen').style.display='none';
if(document.getElementById('voor')) document.getElementById('voor').style.display='';
if(document.getElementById('inst')) document.getElementById('inst').style.display='none';
}
function inst() {
if(document.getElementById('reviews')) document.getElementById('reviews').style.display='none';
if(document.getElementById('specificaties')) document.getElementById('specificaties').style.display='none';
if(document.getElementById('gerelateerd')) document.getElementById('gerelateerd').style.display='none';
if(document.getElementById('algemeen')) document.getElementById('algemeen').style.display='none';
if(document.getElementById('voor')) document.getElementById('voor').style.display='none';
if(document.getElementById('inst')) document.getElementById('inst').style.display='';
}