JavaScript does not use an if statement to verify the form.

It is actually useful, but it is short!

Code:

Function check () {// user name var nickname = $ ("# nickname"); var nickname_error = $ ("# nickname_error "); // address error var address_error = $ ("# address_error"); // detailed address var detail = $ ("# detail "); vaR detail_error = $ ("# detail_error"); // verify var err_nick = nickname. val () = ""? "Enter a nickname! ":" "; Nickname_error.text (err_nick); var err_det = detail. Val () = ""? "Enter the detailed address! ":" "; Detail_error.text (err_det); // check whether all regions have var P =$ (" # P "); // provincial/municipal var c = $ ("# C"); var A = $ ("# A"); var err_add = P. val () = "0" | C. val () = "0" |. val () = "0 "? "Select a region. Select a province, city, or county! ":" "; Address_error.text (err_add); Return err_nick =" "& err_det =" "& err_add = ""? True: false ;;}