Displaying HTML Properly
So nowadays, there are textareas hiding all over the place; displaying button codes, and being used for tutorials.
This isn't the right way to display HTML.
Instead of <textarea>, you should use <code> or <pre>.
Textareas are used for forms and commenting. Although they display can HTML, <code> or <pre> are correct.
When using <code> or <pre>, however, any < must be changed to <.
Likewise, > must be changed to >, like so:
<code><strong> OTHER CODES </strong></code>
So instead of inserting <strong>, we insert <strong>.
It's easy to customise <code> with your CSS! Paste this into your CSS and edit to your liking.
code, pre {
display:block;
height: auto;
background: #eee;
font: normal 11px/12px georgia;
text-align: left;
padding: 3px;
}

