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: 4

?

  1. id="age-table" .
  2. label (3)
  3. td (Age )
  4. search form
  5. input
  6. input

table.html

:

// 1. id="age-table" 
let table = document.getElementById('age-table')

// 2.  label 
table.getElementsByTagName('label')
// or
document.querySelectorAll('#age-table label')

// 3.  td (Age ).
table.rows[0].cells[0]
// or
table.getElementsByTagName('td')[0]
// or
table.querySelector('td')

// 4.  search  form.
// name="search" 1
let form = document.getElementsByName('search')[0]
// or, form 
document.querySelector('form[name="search"]')

// 5.  input
form.getElementsByTagName('input')
// or
form.querySelector('input')

// 6.  input
// 
let inputs = form.querySelectorAll('input') // 
inputs[inputs.length-1] // 

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