Could you help me look at the JAVASCRIPT submission?

Source: Internet
Author: User
Please take a look at the JAVASCRIPT submission. I mainly want to keep the data of the form after submitting the form. I bought this book "learn php in depth". the code on page 395 contains a handle_f, I copied it, but I didn't execute it in PHP. why? I changed it a bit here, but PHP didn't execute handle_f. if it is executed, a dialog box 'helloworld' will pop up. <Please help me check a JAVASCRIPT commit.
I mainly want to keep the data of the form after submitting the form, and I bought this book "learn php from the deep learning". the code on page 395 contains a handle_f, which I copied, but I didn't execute it in PHP. why? I changed it a bit here, but PHP didn't execute handle_f. if it is executed, a dialog box 'Hello World' will pop up'



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