>I think that only applied to 'option' controls - not 'input'
>
>However, I thought that if you disabled before submitting then the submit doesn't happen. i.e. your code should be:

loButton.Attributes.Add("onClick", "document.Form1.submit(); this.disabled=true; return false;");

I can tell you that this is at large, at the highest level of the framework, and the submit always work. :)

But, despite the fact that this no support was only referencing to other controls, I believe it might have applied also to buttons. The situation might be caused because of the usage of "true" instead of "disabled". That is why I need to complete the installation of IE, currently in progress, and take a look at this.