Tryit Editor v1.7

Source Code:

Result:

<!DOCTYPE html>
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $(":enabled").css("background-color","red");
});
</script>
</head>
<body>

<form action="">
Name: <input type="text" name="user"><br>
ID:<input type="text" name="id" disabled="disabled">
Age:
<select disabled="disabled">
<option>20-30</option>
<option>30-50</option>
<option>50+</option>
</select>
<input type="submit">
</form>

</body>
</html>

Edit the code above and click "Submit Code" to see the result.

W3Schools.com - Try it yourself

Source Code:	Result:
<!DOCTYPE html> <html> <head> <script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"> </script> <script> $(document).ready(function(){ $(":enabled").css("background-color","red"); }); </script> </head> <body> <form action=""> Name: <input type="text" name="user"><br> ID:<input type="text" name="id" disabled="disabled"> Age: <select disabled="disabled"> <option>20-30</option> <option>30-50</option> <option>50+</option> </select> <input type="submit"> </form> </body> </html>
Edit the code above and click "Submit Code" to see the result.	W3Schools.com - Try it yourself