Since the HTML that you are working with is generated by your own code, you better post the outputted HTML of the problem row and your JavaScript in Startup Script (Right click the element in Chrome and select Inspect and go to the Elements panel to copy outputted HTML, see Open the Elements panel to inspect the DOM or CSS) for discussion.Press F12 in your browser and go to the Console panel, test your script, when it does not work, check for JavaScript errors in the Console panel.To check if your Ajax is working properly, see Check HTTP Response.Note again that your Startup Script should be like: (The CSS selector is “[id^=mronde_]”)
$("[id^=mronde_]").on("change", function(e) { // Select all elements with id starting with "mronde_" or if you have added your class to your elements you may use $(".my-class")
// your code
});