function tab(box) {
document.getElementById('bmibox').style.visibility='hidden';
document.getElementById('hipbox').style.visibility='hidden';
document.getElementById('brocabox').style.visibility='hidden';
document.getElementById('heightbox').style.visibility='hidden';
document.getElementById('fazitbox').style.visibility='hidden';
document.getElementById('mostellerbox').style.visibility='hidden';
document.getElementById('ponderalbox').style.visibility='hidden';
document.getElementById('bmitab').style.color='#8F8F8F';
document.getElementById('hiptab').style.color='#8F8F8F';
document.getElementById('brocatab').style.color='#8F8F8F';
document.getElementById('heighttab').style.color='#8F8F8F';
document.getElementById('fazittab').style.color='#8F8F8F';
document.getElementById('mostellertab').style.color='#8F8F8F';
document.getElementById('ponderaltab').style.color='#8F8F8F';

document.getElementById('bmitab').style.borderColor='#8F8F8F';
document.getElementById('hiptab').style.borderColor='#8F8F8F';
document.getElementById('brocatab').style.borderColor='#8F8F8F';
document.getElementById('heighttab').style.borderColor='#8F8F8F';
document.getElementById('fazittab').style.borderColor='#8F8F8F';
document.getElementById('mostellertab').style.borderColor='#8F8F8F';
document.getElementById('ponderaltab').style.borderColor='#8F8F8F';


if(box=='hip'){
document.getElementById('hipbox').style.visibility='visible';
document.getElementById('hiptab').style.borderColor='#000000';
document.getElementById('hiptab').style.color='#000000';
}
if(box=='bmi'){
document.getElementById('bmibox').style.visibility='visible';
document.getElementById('bmitab').style.borderColor='#000000';
document.getElementById('bmitab').style.color='#000000';
}
if(box=='broca'){
document.getElementById('brocabox').style.visibility='visible';
document.getElementById('brocatab').style.borderColor='#000000';
document.getElementById('brocatab').style.color='#000000';
}
if(box=='height'){
document.getElementById('heightbox').style.visibility='visible';
document.getElementById('heighttab').style.borderColor='#000000';
document.getElementById('heighttab').style.color='#000000';
}
if(box=='fazit'){
document.getElementById('fazitbox').style.visibility='visible';
document.getElementById('fazittab').style.borderColor='#000000';
document.getElementById('fazittab').style.color='#000000';
}
if(box=='mosteller'){
document.getElementById('mostellerbox').style.visibility='visible';
document.getElementById('mostellertab').style.borderColor='#000000';
document.getElementById('mostellertab').style.color='#000000';
}
if(box=='ponderal'){
document.getElementById('ponderalbox').style.visibility='visible';
document.getElementById('ponderaltab').style.borderColor='#000000';
document.getElementById('ponderaltab').style.color='#000000';
}

return
}