jQuery Simple Example

HTML

<script src="//www.addressfinder.co.nz/assets/v2/widget.js"></script>
<label for="search_field">Address</label>
<input type='text' class='address_field' /><br>
<label for="search_field">Address Yang Terinput</label>
<input type='text' class='address_fill' />

JavaScript

$(document).ready(function() {
	var jF = {
  	input: null,
    onKeyUp: function() {
    	var self = this
      $('.address_field').on('keyup', function(e) {
      	self.input = e.target.value
        self.onFillAddress()
      })
    },
    onFillAddress: function() {
    	$('.address_fill').val(this.input)
    }
  }
  jF.onKeyUp()
});