This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
I have a radio button Yes/No. If user clicks 'No' I make the hidden text box visible. this textbox validation should trigger if it is empty. How to do this? if user pressed YES then the validation should not fire.