Get the number of a number field:
var x = document.getElementById("myNumber").value;
Click the button to display the number of the number field.
<!DOCTYPE html> <html> <body> Number: <input type="number" id="myNumber" value="2"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {/*from www. j ava 2 s .c o m*/ var x = document.getElementById("myNumber").value; document.getElementById("demo").innerHTML = x; } </script> </body> </html>