![]() We will ensure that submit button is disabled as we have not selected city option yet. Inside the change function we will first remove the available options. Populating state listOnce one country is selected by user, it will trigger change function of drop down box. This part is PHP script only and it populates the list by taking records from database table. Populating Country listboxWe will first populate the country list while loading the page. How the script works.This script works by using PHP script at backend and using JQuery for various control at client side. How To Populate A State List With Country Dropdown In Pega KeyAfter selection of all three list boxes, the submit button will be enabled to submit the form. ![]() Same way after selection of state the available cities of the state will be displayed as options for the user to select. After selecting country the available state in the selected country will be displayed as options in the second dropdown list. User can select a country first, then select a state and then select City. This script has one main page to display three dropdown list with a button to submit the form to another page.
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