Capture child event in parent

I have got a task and i would like to know ways how it could be done.
I have got .aspx file and it includes user control (ascx)
i want to do that after clicking edit button in user control tabs in
parent(aspx) become disabled.
i tryed to do it by putting value into hidden field under usercontrol
and make public to read from it but it does not work because first
loads prent after it loads child and only than button_click happens
and parent does not know that edit button was clicked before second
forced refreash.

Please help me to sort this somehow

.