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<html><body><form id="myForm" action="/action_page_binary.asp" method="post"> First name: <input type="text" name="fname" value="Donald"><br> Last name: <input type="text" name="lname" value="Duck"><br> <input type="submit" value="Submit"></form><p>Click the "Try it" button to change the value of the enctype attribute, for how the form data should be encoded.</p><p><b>Note:</b> Click "Submit" before and after you have clicked the on "Try it" button.</p><button onclick="myFunction()">Try it</button><p id="demo"></p><script>function myFunction() { document.getElementById("myForm").enctype = "multipart/form-data"; document.getElementById("demo").innerHTML = "Form data will now be encoded as multipart/form-data.";}</script></body></html>