<style>
#myElement {
// display: none;
// display: block;
}
</style>
<button onclick="myFunction()">Click me</button>
<p id="demo"></p>
<script>
function myFunction()
{
document.getElementById("myElement").style.display = "none";
}
</script>
<div id="myElement">
<form action="">
<label for="fname">First name:</label><br>
<input type="text" id="fname" name="fname" value="John"><br>
<label for="lname">Last name:</label><br>
<input type="text" id="lname" name="lname" value="Doe"><br><br>
<input type="submit" value="Submit">
</form>
</div>