I am trying to call a javascript simple alert function when I catch an exception in my C# code as follows:

inside my function:

try

{

    //something!

}

catch (Exception exc)

{

    ClientScript.RegisterStartupScript(typeof(Page), SymbolError, 

     <script type='text/javascript'>alert('Error !!!');return false;</script>);

}

Is there another way I can do this, because this doesn't show any alert boxes or anything??