Javascript Intro

Question 1

JavaScript Can Change HTML Content One of many JavaScript HTML methods is getElementById(). This example uses the method to “find” an HTML element (with id=”demo”) and changes the element content (innerHTML) to “Hello JavaScript”:

Javascript can change HTML content

JavaScript can change HTML content.

Javascript accepts double and single quotes.

Answer 1

document.getElementById(“demo”).innerHTML = “Hello JavaScript!

Question 2

JavaScript Can Change HTML Attribute Values. In this example JavaScript changes the value of the src (source) attribute of an tag:

Answer 2

=”document.getElementById(‘myImage’).src=’pic_bulbon.gif’” img id=”myImage” src=”pic_bulboff.gif” style=”width:100px”

Question 3

JavaScript Can Change HTML Styles (CSS) Changing the style of an HTML element, is a variant of changing an HTML attribute:

Answer 3

=”document.getElementById(‘demo’).style.fontSize=’35px’”

Question 4

JavaScript Can Hide HTML Elements Hiding HTML elements can be done by changing the display style:

Answer 4

=”document.getElementById(‘demo’).style.display=’none’”

Question 5

JavaScript Can Show HTML Elements Showing hidden HTML elements can also be done by changing the display style:

Answer 5

p id=”demo” style=”display:none” =”document.getElementById(‘demo’).style.display=’block’”