•  The use of JavaScript function.
• Use "onclick()" in HTML button to call the JavaScript function.
• Using "console.log()" and inspect element in browser for bug-fixing.
• String operations, such as concatenate strings and get a particular character in the string using array.
• JavaScript's variable ("var").
• Edit the HTML style in JavaScript.
• Open a new window using "window.open()".
• Get today's date using "new Date()".
• Get the HTML element using "document.getElementById()".
• HTML list operation using "push()", "appendChild()" and "removeChild()".

• Basics to JQuery syntax
• Document ready event function usage

$(document).ready(function(){...}

• Making basic function to take value from a form
• Making a paragraph using

$('p:first').text('this is the first paragraph');
$('p:last').text('this is the last paragraph');
$('p').not(':first').text('this is the middle paragraph');
$('span').text('this is footer');

• Using on('click' ... function while adding class to paragraph
• Using simple CSS style classes

• Using create_ajax function

function create_ajax() { 
var xmlhttp = null; 
    if (window.XMLHttpRequest) { 
     // code for IE7+, Firefox, Chrome, Opera, Safari 
     xmlhttp = new XMLHttpRequest(); 
    } else { // code for IE6, IE5 
        xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 
   } 
 return xmlhttp; 
 }

• Using count() function to add up two numbers using plus.php