Help my code not work

Question

<button onclick="btn()"> read more </button>
<p id="a"> </p>
<style>
function btn() {
document.getElementById("a").innerHTML = "hi";
}
</style>

Error: btn() not defined

This is made by in my mind, not by someone

Answer 1

Just replace 'style' tag with 'script' tag.

"style" tag is for CSS
"script" tag is for JS

Answer 2

Replace "style" with "script". You have created your Javascript function inside embedded style block.

Answer 3

WOW,
I always do this simplest mistake, sorry guys!, And thanks!