Algorithms/Find maximum/java script method 1

<script language="javascript">

   function findMax(intA) {
      if ( intA.length == 0 ) 
         return 0;
     if ( intA.length == 1 ) 
         return 1;
      var o_intMax = intA[0];
      for (var p_intI = 1; p_intI < intA.length; p_intI++) {
          if ( intA[p_intI] > o_intMax ) {
             o_intMax = intA[p_intI];
          } // end if
      } // end loop
      return o_intMax;
    } // end method
    var intA = new  Array(1,3,6);
    document.write(findMax(intA));
 </script>