// JavaScript Document

function setWallsClass() {
  document.getElementById("w2").className = "hiddenDiv";
  document.getElementById("w3").className = "hiddenDiv";
  document.getElementById("w4").className = "hiddenDiv";	
}
function changeWeek(id) {
  for(var i = 0; i < 4; i++) {
	document.getElementById("w" + (i + 1)).className = "hiddenDiv";
	if(i == 0) {
	  document.getElementById("wl" + (i + 1)).className = "gray";	
	} else {
	  document.getElementById("wl" + (i + 1)).className = "old gray";
	}
  }
  document.getElementById("w" + id).className = "visibleDiv";
  if(document.getElementById("wl" + id).className == "old gray") {
  	document.getElementById("wl" + id).className = "old white";
  } else {
	document.getElementById("wl" + id).className = "white";
  }
}