Page load or Post Back problem Twice double in asp.net

Hey I am Give You good Suitable answer...consider my page in iusermain.aspx page
then go in source of yourusermain.aspx which control you use go to ther

example:=


      < asp:ImageButton ID="ImgBack" runat="server"  ImageUrl="~/TreeImages/backward-48.png"      
       onclick="imageclickhere"
       ToolTip="Back To Up" BorderStyle="None" />
>
>
> here the "imageclickhere" is function name that not have any handles of
> the imgback
>
> 2.now goto usermain.aspx.vb  write imageclickhere function  protected sub imageclickhere() 'write your code here which you want execute
> 'this function doesn't postback twice
>
> end sub
>
>
> 'okk DINESH KANSE preffer my blog http://www.dssoftz.blogspot.in/