选中复选框后，表行背景颜色会发生变化

I am working on a script in PHP where the data is coming from mysql db. My requirement is if the checkbox is already checked (data coming from db) the table row color should be a different color, its just to highlight the user that its been checked and attention is required. There should be also be an option if the user unchecks it the background color needs to go off. I have worked on the script and if already checked its showing a red bg color. But when i uncheck it, its not working. Can anyone pls guide me on this. My script is below:I am working on a script in PHP where the data