Find out if a number field is disabled or not:
var x = document.getElementById("myNumber").disabled;
Click the button to find out if the number field is disabled.
<!DOCTYPE html> <html> <body> <input type="number" id="myNumber" value="2" disabled> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {// w w w .j ava2 s. c o m var x = document.getElementById("myNumber").disabled; document.getElementById("demo").innerHTML = x; } </script> </body> </html>