Data transfer code between Javascript forms_form effects

First, the simplest is the data transfer of forms in the same web page.
For example, there are two forms on a web page, each with a text box and a button. Click the buttons to operate the value of each other's text box. The example we gave is to pay one text box to another text box. The specific HTML code is as follows:

Copy code The code is as follows:

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The above is the HTMl code. You may have noticed the onclik code. There are two functions. Next is the JAVASCRIPT code:

Copy code The code is as follows:

Second, the second is to transfer data between the text boxes of the form between the two windows. In fact, this can be expanded on the original basis. Regarding how to create a pop-up window and the code of the form in the form, I won