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<!DOCTYPE html>
<html>
<body>
​
<iframe id="myFrame" src="../default.html" style="height:380px;width:100%"></iframe>
​
<p>Click the "Tryit" button to hide the first H1 element in the iframe (another document).</p>
​
<button onclick="myFunction()">Try it</button>
​
<script>
function myFunction() {
  var iframe = document.getElementById("myFrame");
  var elmnt = iframe.contentWindow.document.getElementsByTagName("H1")[0];
  elmnt.style.display = "none";
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/howto/tryit.asp?filename=tryhow_js_element_iframe by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:39:19 GMT -->
</html>
​
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