Hi, recently one interview question asked to me, that is if i have the server control like <asp:button id="button1" runat="server" Text="Insert" OnClick="button1_Click"/> in the web page, during the runtime if i right click on the page and view the page source of the page in mozilla firefox browser, in the page source the button control source display in the html format like <input type="submit" name="Button1" value="Submit" id="Button1" /> here it doesn't have the onclick property, then how the event is fired when i click the button, and page is postback, and how the html page source is performing the button click event, even it doesn't have runat="server" and also onclick property in the page source. if anyone knows answer for it please help me