<!DOCTYPE html>
<
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>
<
head
>
<
meta
name
=
"viewport"
content
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</
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>
</
head
>
<
body
>
<
div
class
=
"container"
>
<
h1
>GeeksforGeeks</
h1
>
<
h3
>A Computer Science Portal for Geeks</
h3
>
<
hr
>
<
h2
>Portfolio of Languages</
h2
>
<
div
id
=
"filtering"
>
<
button
class
=
"bttn active"
onclick
=
"geeksportal('all')"
>
Show all
</
button
>
<
button
class
=
"bttn"
onclick
=
"geeksportal('Markup')"
>
Markup
</
button
>
<
button
class
=
"bttn"
onclick
=
"geeksportal('Style')"
>
Style
</
button
>
<
button
class
=
"bttn"
onclick
=
"geeksportal('Scripting')"
>
Scripting
</
button
>
</
div
>
<
div
class
=
"row"
>
<
div
class
=
"column Markup"
>
<
div
class
=
"content"
>
<
img
src
=
alt
=
"HTML"
style
=
"width:100%"
>
<
h3
><
a
href
=
"#"
>
HTML Tutorials
</
a
>
</
h3
>
<
p
>
HTML stands for Hyper Text Markup
Language. It is used to design web
pages using markup language. HTML
is the combination of Hypertext
and Markup language. Hypertext
defines the link between the web
pages.
</
p
>
</
div
>
</
div
>
<
div
class
=
"column Styleshit"
>
<
div
class
=
"content"
>
<
img
src
=
alt
=
"CSS"
style
=
"width:100%"
>
<
h3
><
a
href
=
"#"
>
CSS Tutorials
</
a
>
</
h3
>
<
p
>
Cascading Style Sheets, fondly
referred to as CSS, is a simply
designed language intended to
simplify the process of making
web pages presentable. CSS allows
you to apply styles to web pages.
</
p
>
</
div
>
</
div
>
<
div
class
=
"column Scripting"
>
<
div
class
=
"content"
>
<
img
src
=
alt
=
""
style
=
"width:100%"
>
<
h3
><
a
href
=
"#"
>
PHP Tutorials
</
a
>
</
h3
>
<
p
>
The term PHP is an acronym for PHP:
Hypertext Preprocessor. PHP is a
server-side scripting language
designed specifically for web
development. PHP can be easily
embedded in HTML files.
</
p
>
</
div
>
</
div
>
<
div
class
=
"column Scripting"
>
<
div
class
=
"content"
>
<
img
src
=
alt
=
""
style
=
"width:100%"
>
<
h3
><
a
href
=
"#"
>
JavaScript Tutorials
</
a
>
</
h3
>
<
p
>
Javascript was developed by Brendan
Eich in 1995. At first, it was called
LiveScript but was later name to
JavaScript. JavaScript is the muscle
of the structure
</
p
>
</
div
>
</
div
>
</
div
>
</
div
>
<
script
>
geeksportal("all")
function geeksportal(c) {
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}
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}
}
function w3RemoveClass(element, name) {
var i, arr1, arr2;
arr1
=
element
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arr2
=
name
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i
=
0
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while (arr1.indexOf(arr2[i]) > -1) {
arr1.splice(arr1.indexOf(arr2[i]), 1);
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}
element.className = arr1.join(" ");
}
// Add active class to the current
// button (highlight it)
var btnContainer = document.getElementById("filtering");
var btns = btnContainer.getElementsByClassName("bttn");
for (var i = 0; i <
btns.length
; i++) {
btns[i].addEventListener("click", function() {
var
current
=
document
.getElementsByClassName("active");
current[0]
.className
=
current
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}
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body
>
</
html
>