if (!(Array.indexOf || [].indexOf)) {
name Array
namespace Array extensions for Sakai
Array.prototype.indexOf = function(obj,start) {
Finds the first occurrence of an element in an array and returns its position. This only kicks in when the native .indexOf method is not available in the browser.
param {Object/String/Integer} obj The element we are looking for
param {Integer} start Where the search starts within the array
returns Returns the position of the first matched element
type Integer