Find out if a button is disabled or not:
var x = document.getElementById("myBtn").disabled;
Click the button below to find out if the button above is disabled.
<!DOCTYPE html> <html> <body> <input type="button" id="myBtn" value="My Button" disabled> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {//from w w w . j av a 2s . co m var x = document.getElementById("myBtn").disabled; document.getElementById("demo").innerHTML = x; } </script> </body> </html>