function showSub(which) {
	if( which ) {
		var submenuArr = document.getElementById('navigation').getElementsByTagName('ul');
		for(var i=0; i < submenuArr.length; i++){
			if(submenuArr[i].className.indexOf('submenu') != -1){
				if((submenuArr[i].id == document.getElementById(which).id) && (document.getElementById(which).style.display == 'none')){
					document.getElementById(which).style.display = 'block';
				}else if((submenuArr[i].id == document.getElementById(which).id) && (document.getElementById(which).style.display == 'block')){
					document.getElementById(which).style.display = 'none';
				}else{
					submenuArr[i].style.display = 'none';
				}
			}
		}
	}
}

//-- change language
function setLanguage(_lang) {
    window.location.href = window.location.pathname.replace(/\/(nl|en|es|fr|de)/, "/" + _lang) + window.location.search;
}