<script src="http://cdn.bootcss.com/jquery/1.11.3/jquery.min.js"&gt;
<script type="text/javascript">

function changeKeyboard(){
  var arr=[1,0];
  arr.sort(function(){return Math.random()>0.5?-1:1;});
  var sp = $(".s");
  console.log(sp);
  for (var i = 0; i < sp.length; i++) {
    $(sp[i]).text(arr[i]);
  }
}

changeKeyboard();
$("#keyboard").click(function(){
  changeKeyboard();
});