Here is what I am trying to do in ASP.NET:
Create one page called Main.aspx. This page has a DIV and a buttons.
The browser loads Main.aspx. Then when I click the button, I want to load page Page99.aspx into the DIV in Main.aspx dynamically, but without Main.aspx requiring a postback.
So, Main.aspx loads once, and thereafter all the content displayed in Main.aspx will come from different .aspx pages.
Ps. I'm looking for a solution as above, but not using frames.
UPDATE 1
I should mention that Page99 is not a simple HTML page. It will contain Web controls.
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