How can I manipulate postback priority?

[Dumont]

I have a lot of textboxes with the TextChanged event. There is also a master textbox at the top, which if I change it and press a "Change All" button, it changes the entire page of textboxes.Now, the button exists almost entirely on the client side (just uses jquery to change the textboxes), but I want to know if it has been pressed BEFORE my program runs through the 100+ TextChanged events. I tried adding a server function for it to set a boolean to true, hoping it would fire first, however, the TextChanged events fire first.TL;DR I need to tell my program in which order to go through the events after a postback.