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<html><body><meta http-equiv="content-type" content="text/html"><p>Click the button to change the value of the http-equiv attribute to refresh, and the content attribute to 30 seconds. This will refresh the document every 30 seconds.</p><button onclick="myFunction()">Try it</button><p id="demo"></p><script>function myFunction() { document.getElementsByTagName("META")[0].httpEquiv = "refresh"; document.getElementsByTagName("META")[0].content = "30"; document.getElementById("demo").innerHTML = "The document will refresh every 30 seconds.";}</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_meta_httpequiv2 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 21 Dec 2022 18:16:59 GMT --></html>