Partial page refresh Ajax call on button click
I would suggest to:


I would recommend to use camelCase naming style, so instead of ApprovalTable you could use approvalTable
you are using a function to define a handler for an event, the name is not very consistent with what this function does, you could rename it to enableRequestValidationHandler
It's often a good idea to cache selectors, if you plan to use them more than once, so instead of using directly $('#largeModal') you could use somewhere:

var largeModal = $('#largeModal');


then use it in the ajax response handler via variable success: function (result) {...

The reason to do that, is because jQuery dive in html everytime you ask him to find something in html


you already defined var selectedButton = $(this); but still use $(this) in your code, you could use instead the selectedButton variable. I usually call it: self


These lessons will help you to understand fast and easy how jquery works