Changing background color of text box input not working when empty

Question

I am having a tough time with this javascript code to change the background color of a text input if the input is empty.

Here is the code:

function c         


        

Answer 1

Don't add styles to value of input so use like

function checkFilled() {
    var inputElem = document.getElementById("subEmail");
    if (inputElem.value == "") {
        inputElem.style.backgroundColor = "yellow";
                }
        }