<script type="text/javascript">
  function areaFunction(radiusParam)
  {
      /// <summary>Determines the area of a circle based on a radius parameter.</summary>
      /// <param name="radius" type="Number">The radius of the circle.</param>
      /// <returns type="Number">The area.</returns>
      var areaVal;
      areaVal = Math.PI * radiusParam * radiusParam;
      return areaVal;
  }
</script>

var areaVal = areaFunction(