var ge = new Array('nul','een','twee','drie','vier','vijf','zes','zeve');

function show(bla){
var bla = parseInt(bla);
var b = ge[bla];
	switch(b){
		case 'een': document.all.sub1.style.visibility = "visible";weg(2);weg(3);weg(4);weg(5);weg(6);weg(7);break;
		case 'twee': document.all.sub2.style.visibility = "visible";weg(1);weg(3);weg(4);weg(5);weg(6);weg(7);break;
		case 'drie': document.all.sub3.style.visibility = "visible";weg(1);weg(2);weg(4);weg(5);weg(6);weg(7);break;
		case 'vier': document.all.sub4.style.visibility = "visible";weg(1);weg(2);weg(3);weg(5);weg(6);weg(7);break;
		case 'vijf': document.all.sub5.style.visibility = "visible";weg(1);weg(2);weg(3);weg(4);weg(6);weg(7);break;
		case 'zes': document.all.sub6.style.visibility = "visible";weg(1);weg(2);weg(3);weg(4);weg(5);weg(7);break;
		case 'zeve': document.all.sub7.style.visibility = "visible";weg(1);weg(2);weg(3);weg(4);weg(5);weg(6);break;
	}
}

function weg(bl){
var cl = parseInt(bl);
var ljd = ge[cl];
	switch(ljd){
		case 'een': document.all.sub1.style.visibility = "hidden"; break;
		case 'twee': document.all.sub2.style.visibility = "hidden"; break;
		case 'drie': document.all.sub3.style.visibility = "hidden"; break;
		case 'vier': document.all.sub4.style.visibility = "hidden"; break;
		case 'vijf': document.all.sub5.style.visibility = "hidden"; break;
		case 'zes': document.all.sub6.style.visibility = "hidden"; break;
		case 'zeve': document.all.sub7.style.visibility = "hidden"; break;
	}
}