New guy, how can I read a value from a text box and output it in another text box?

Source: Internet
Author: User
New Guy For Help! How can I read A value from A text box and output it in another text box? for example, if there is text box A and B, A button C, enter 1234 in text box A, and click "C, in the text box B, 1234 is displayed. is $ _ POST used for the value? & Nbsp; then define A function. when the button is clicked, C reads the value in A and outputs it in B? & Nbsp; ask for help. ------ solution -------------------- j. help! How can I read a value from a text box and output it in another text box?
For example, if there is text box A and B, A button C, enter 1234 in text box A, click the button C, and then 1234 is displayed in text box B. is $ _ POST used for value? Then define A function. when the button is clicked, C reads the value in A and outputs it in B? Please help me.
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