对动态文本框和标签的验证

Alright so i am completely lost on how to do this. What i need to do is validate the textbox's with regular expression for some and required field for all of them. I have it set up so when the user clicks the button a new set of input fields show up every time, so that if they have more than one job experience they can put it in infinitely. The code i tried won't work. Also may want to note that I have only done the address one so far due to running into this issue. Once i figure that out i will be able to do the rest.Alright so i am completely lost on how to do th