/**
 * @author wouwerkerk
 */

var btnArr = [document.getElementById('btn_do'), document.getElementById('btn_vr'), document.getElementById('btn_za'),document.getElementById('btn_zo')];
var divArr = [document.getElementById('do'), document.getElementById('vr'), document.getElementById('za'),document.getElementById('zo')];

if(btnArr[0] != null){
	btnArr[0].onclick = function(){ setActiveDiv(divArr, divArr[0]); setActiveBtn(btnArr, btnArr[0]); }
	btnArr[1].onclick = function(){ setActiveDiv(divArr, divArr[1]); setActiveBtn(btnArr, btnArr[1]); }
	btnArr[2].onclick = function(){ setActiveDiv(divArr, divArr[2]); setActiveBtn(btnArr, btnArr[2]); }
	btnArr[3].onclick = function(){ setActiveDiv(divArr, divArr[3]); setActiveBtn(btnArr, btnArr[3]); }
}