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<html><body><form id="myForm"> <input type="number" id="myNumber" value="2"></form><p>Click the button to return the id of the form the number field belongs to.</p><button onclick="myFunction()">Try it</button><p><strong>Note:</strong> input elements with type="number" are not supported in IE 9 and earlier versions.</p><p id="demo"></p><script>function myFunction() { var x = document.getElementById("myNumber").form.id; document.getElementById("demo").innerHTML = x;}</script></body><!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_number_form by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 05 Sep 2022 15:53:05 GMT --></html>