google chart API with asp.net update panel

I am trying to create a webpage where user will click a button and upon pressing a button three things will happen: 1) show a loading image while data is being fetched from server 2) when data fetching is completed, display a table with sorting functionality(using javascript to sort the table and label to display to table in code behind) 3) display google charts (again using javascript). so far, I have the button and loading image and label under update panel with following code and it works but I can not get table and google chart to display. How should I wire javascripts so they work in sequence? I am not sure how I can call google chart draw function to make google chart appear. I have looked at several posting but couldnt find anything that works for my case. I even tried google.load('visualization', '1', { packages: ['corechart'], "callback":drawVisualization}) but it didnt work. If I take the submit button out of update panel and pagerequestmanager ...