Promocode remove button text change in site builder

1. Navigate to Commerce > Web Sites > Website Lists
2. Click the Appearance tab
3. Under the Web Site Templates section we took note of the value for Web Site Theme
4. Navigate to Commerce > Site Builder > Apperarance > Themes
5. Edit the theme that we took note of on step number 3
6. Click on the Body tab
7. On the Footer Template text area, place the following sample code:

document.getElementById("removecoupon").value= "Change the text here"