提交按钮上的Html确认弹出窗口

In my application i have submit button which called store procedure in my db also on same page a have textbox which required data in it. I used required field validator for that textbox. And Ajax conformition thing for my submit button and confirm validation fire if text box is empty. I need check if that textbox is filed with data firs and only after that conformation should fire on button. I don't want popup fire before required field validation. In my application i have submit button which ca