Try

btnSubmit.Attributes.Add("onclick", "btnOnClick();")

or in C# I think its

btnSubmit["onclick"] = "btnOnClick();";

This is for asp.net controls. HTML controls work as you would expect.

>Hi Hector,
>
>Know how to find out how to do this? :-) When I try to implement the button's client side "OnClick" event, E.g.
>

<asp:button id="btnSubmit" OnClick="javascript:btnOnClick()" runat="server" Font-Size="X-Small" Font-Names="Arial" Text="Submit"></asp:button>

>ASP.NET squeals like a stuck pig.
>
>Bill
>
>>I *think* you could have each button call a different (client side) JavaScript function. Inside each function you'll do whatever validations you need and then call document.myform.submit to actually post the form the web server.
>>
>>I say "I think" because I have never done this, I've only seen/heard examples that mention this. Hope this helps.