Hi,

I am trying to disable (on runtime) a LinkButton that is running on a
server side .
I am using this javaScript code:

<script language="javascript">
function Enable_CmdSend()
{
    if(this.checked)
    {
        document.getElementById('cmdSend').disabled = false;
    }
    if(!this.checked)
    {
        document.getElementById('cmdSend').disabled = true;
    }
}
</script>

and i keep getting this error message:

'document.getElementById(...)' is null or not an object

what should i do to make it work?????

thanks,
Dror