Questions about passing values between multiple pop-up boxes

Ask the question of passing values between multiple pop-up boxes. now, click a release button to bring up the first box, and enter some information in it. if the current status is login, some information is filled in the form with his account information. if you do not log in, you can enter the information by yourself. Click submit and then click submit to determine whether to log on. if you have not logged on, the second dialog box is displayed, which allows you to switch between registration and login. If it is a registration, I hope to pass the value between multiple pop-up boxes.
Now, you need to click a release button to bring up the first box, and enter some information in it. if the current status is login, some information is filled in the form with his account information. if you do not log in, you can enter the information by yourself. Click submit and then click submit to determine whether to log on. if you have not logged on, the second dialog box is displayed, which allows you to switch between registration and login. If it is a registration, you want to take part of the data filled in the first box as the registration information, that is, the registration page needs to use the data filled in the first form. Then, after completing registration or login in the second pop-up box, you can directly submit the first form. What plug-ins can be used in this pop-up? what is the general idea of implementation? Thank you! Php plug-ins:
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Pop-up box, lz can use this http://www.planeart.cn/demo/artDialog/