title: Get tomorrow's date with getDay Javascript
body: <p>What I am making is a weather forecast website, and what I need is the days of the week (ie. "Sunday", "Monday", etc.). To get tomorrow's date I am just putting "+ 1" like someone suggested in another question, but when it get's to Saturday, it says "undefined". How do I make it so when it gets to Saturday, + 1 will loop over to Sunday? Thanks in advance!</p>
  
  <pre><code>var day=new Date();
  var weekday=new Array(7);
  weekday[0]="Sunday";
  weekday[1]="Monday";
  weekday[2]="Tuesday";
  weekday[3]="Wednesday";
  weekday[4]="Thursday";
  weekday[5]="Friday";
  weekday[6]="Saturday";
  
  document.getElementById('tomorrow').innerHTML = weekday[day.getDay() + 1];
  document.getElementById('twodays').innerHTML = weekday[day.getDay() + 2];
  document.getElementById('threedays').innerHTML = weekday[day.getDay() + 3];
  </code></pre>