Function to find maximum and minimum value on JavaScript Array.

minmax.js

// Get maximum value from array
function findMax(array) {
  var max = 0;
  var a = array.length;
  for (counter=0; counter<a; counter++) {
    if (array[counter] > max) {
      max = array[counter];
    }
  }
  return max;
}

// Get minimum value from array
function findMin(array) {
  var min = array[0];
  var a = array.length;
  for (counter=0; counter<a; counter++) {
    if (array[counter] < min) { 
      min = array[counter];
    }
  }
  return min;
}

// http://stackoverflow.com/questions/1379553/how-might-i-find-the-largest-number-contained-in-a-javascript-array/20214662#20214662