Please HELP with JQUERY and JavaScript

1.In the jquery.altrow.js file, code a plugin that uses the getElementsByTagName method to get all of an elements tr child elements. Then, it should apply a class named header to the header row, and classes named even and odd on an alternating basis to the rest of the rows. Note: you can check whether a row contains th elements to see if its a header row.

2. In the altrow.js file, add code to the onload event that calls the plugin for the table element. Run the application and see that the row styles are applied to the table.

HTML file:

Important People in Computer Science

First Name	Last Name	Date of Birth	Accomplishment
Charles	Babbage	12/26/1791	Originated the concept of a programmable computer, invented the first mechanical computer.
Ada	Lovelace	12/10/1815	First computer programmer. Wrote an algorithm for Babbage's mechanical computer.
Alan	Turing	6/23/1912	Invented the Turing Machine, a hypothetical device that's a model of a general purpose computer.
Grace	Hopper	12/9/1906	Invented the first compiler for a computer programming language, popularized the term "debugging" for fixing computer glitches.

query.altrow.js file:

"use strict";

(function ($) { $.fn.pluginName = function(){ return this.each(function() { //the code for the plugin }); }; }) (jQuery);

altrow.js file

"use strict";

window.onload = function() { };