HTML Stylesheet Changing Bug

Hello I implemented a HTML stylesheet changing option on my website. However , there is a slight bug which I cannot seem to fix or figure out. When I click on a option to change th

Solution 1:

Your script is working correct! There is no bug! I have tried with .css different background color like this

body {
    background: red;
}

Maybe your CSS files have some problems. You can give us your CSS files and then we will have all project for control.