How To Use JavaScript To Copy Text From One Field To Another?

Question

当页面首次自动加载时，有什么方法可以将输入文本值或字段数据复制到同一页面上的另一个字段？

Answer 1

How about: document.getElementById('secondField').value = document.getElementById('firstField').value

No JQuery =)

Answer 2

Using jQuery:

$( 'input[name="fieldone"] ).val( $( 'input[name="fieldtwo"]' ).val() );

See http://api.jquery.com/val/ and http://api.jquery.com/attribute-equals-selector/ for specifics.

Without using jQuery you can try (in supported browsers):

document.querySelectorAll('input[name$="fieldone"]').value = document.querySelectorAll('input[name$="fieldtwo"]').value;