randomly display a div class using JQuery

Question

I want to randomly display a div class using JQuery. The code is something like:

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Answer 1

Working example: jsFiddle

js

window.onload=function() {
  var E = document.getElementsByClassName("item");
  var m = E.length;
  var n = parseInt(Math.random()*m);
  for (var i=m-1;i>=0;i--) {
      var e = E[i];
      e.style.display='none';
  }
  E[n].style.display='';
}

js.minified

window.onload=function(){var E=document.getElementsByClassName("item");var m=E.length;var n=parseInt(Math.random()*m);for(var i=m-1;i>=0;i--){var e=E[i];e.style.display='none';}E[n].style.display='';}

html

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