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<!DOCTYPE html> <html> <body> <h1>Demo: prompt()</h1> <button onclick="myinput()">Click to enter your name</button> <p id="msg"></p> <script> function myinput(){ var name = prompt("Enter Your Name:"); if (name == null || name == "") { document.getElementById("msg").innerHTML = "You did not entert anything. Please enter your name again"; } else { document.getElementById("msg").innerHTML = "You enterted: " + name; } } </script> </body> </html>
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