I'm using asp.net Visual Studio 2010 to develop a web site -- trying to make it as "HTML5'ish" as possible.  
Right now, I am completely stumped.  I simply wish to have a message that says "please wait" while my page initially loads the data (it's pulling in data from a sql database via stored procedure).  No matter what I've tried, and I've tried a LOT of different things, the entire page insists on loading and then dumping all the contents on the screen at once.  I've tried various java scripts, jquery, update panels -- I can't get anything to work properly, it all does the same thing.  After looking closer at my code, I noticed that I was loading my data table from the c# Page_Load code behind, so I thought maybe that was the problem.  I tried moving the code behind to a button click, and that may have worked, but I don't know how to simulate a button click to get it to fire automatically.
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