Calling a Server side function from Javascript

Many of us needs a server side function to be called from JavaScript. We can do this easily using __doPostBack

as

Javascript Code

function CallServerCode()

{

__doPostBack('btnTest', '');

}

and in HTML

<­button type="­button" onclick="javascript:CallServerCode();">Call Server Code<­/­button­>

<­asp­:­linkbutton id="btnTest" runat="server" text="ASP .Net Button"­> <­/­asp­:­linkbutton>

and the Server side code

Protected Sub btnHidden_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnTest.Click

Response.Write("Hello")

End Sub

Now note that whenever the client button with caption "Call Server Code" will be clicked it will call Serverside event of btnTest using Javascript.