Im trying to create a button that make my div element show or hide, for open and close it with the same button. I dont get why it does not works, when I click on the button nothing happens, can someone help me please?
<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {
width: 500px;
height: 500px;
background-color: lightblue;
display: none;
}
</style>
</head>
<body>
<p>Click the "Try it" button to set the display property of the DIV element:</p>
<button onclick="myFunction()">Try it</button>
<div id="myDIV">
This is my DIV element.
</div>
<p><b>Note:</b> The element will not take up any space when the display property set to "none".</p>
<script>
var div_aperto = false;
function myFunction(div_aperto)
if (div_aperto) {
div_aperto = false;
document.getElementById("myDIV").style.display = "none"; }
else { div_aperto = true;
document.getElementById("myDIV").style.display = "block"; }
</script>
</body>
</html>
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