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<html><body>Date: <input type="date" id="myDate" value="2014-05-05"><p>Click the button to increment the value of the date field by 5 days (each time you click).</p><button onclick="myFunction()">Try it</button><p><strong>Note:</strong> The stepUp() method is not supported by Internet Explorer 11 and earlier versions.</p><script>function myFunction() { document.getElementById("myDate").stepUp(5);}</script></body></html>