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professional-javascript-03-RandomExample.htm / htm

  <script type="text/javascript">
  function selectFrom(iFirstValue, iLastValue) {
      var iChoices = iLastValue - iFirstValue + 1;
      return Math.floor(Math.random() * iChoices + iFirstValue);
  //select from between 2 and 10
  var iNum = selectFrom(2, 10);
  var aColors = ["red", "green", "blue", "yellow", "black", "purple", "brown"];
  var sColor = aColors[selectFrom(0, aColors.length-1)];

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