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random selector

/ Published in: JavaScript
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Copy this code and paste it in your HTML 
  1. window.onload = function(){
  2.   document.getElementById("randomButton").addEventListener('click', selectRandomOption, false);
  3. }
  4.  
  5. function selectRandomOption() { 
  6.   var box = document.getElementById('s_box');
  7.   box.selectedIndex=box.length-1;
  8.   box.selectedIndex=((Math.random()*box.length)-1);
  9. };

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