linking javaScript with htmal

to link javaScript with html we use script tag

the best place to add the script tag is before the closing bodytag

<script src="js/ add-content.js"></ script> 

Note that JavaScript is case sensitive so hourNow means something different to HourNow or HOURNOW.

Data Type :

• Numeric
• String
• Boolean

Note that Numbers are not only used for things like calculators; they are also used for tasks such as:

• determining the size of the screen
• moving the position of an element on a page
• setting the amount of time an element should take to fade in

example of script :

var today = new Date(); 
var hourNow = today.getHours(); 
var greeting; 
if (hourNow > 18) { 
    greeting = 'Good evening!'; 
    else if (hourNow > 12) { 
    greeting = ' Good afternoon!'; 
    else if (hourNow > 0) { 
    greeting = 'Good morni ng!'; 
    else { greeting = 'Welcome! ' ; 

document .write( ' <h3>' +greeting + ' </ h3>');