function uitklappen_sub1(){document.getElementById('submenu_producten').style.display="block";}
function inklappen_sub1(){document.getElementById('submenu_producten').style.display="none";}
function uitklappen_sub2(){document.getElementById('submenu_promoties').style.display="block";}
function inklappen_sub2(){document.getElementById('submenu_promoties').style.display="none";}