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You can just search for all ids that start with top_sub_menu_

You need to use the ^ like this:

// JQUERY
var menuid = $('[id^="top_sub_menu_"]').attr('id');

// JAVASCRIPT
var menuid = document.querySelector('[id^="top_sub_menu_"]').id

You can just search for all ids that start with top_sub_menu_

You need to use the ^ like this:

// JQUERY
var menuid = $('[id^="top_sub_menu_"]').map(function() { return this.id; }).get();

// JAVASCRIPT
var menuid = document.querySelector('[id^="top_sub_menu_"]').id

You can just search for all ids that start with top_sub_menu_

You need to use the ^ like this:

// JQUERY
$('[id^="top_sub_menu_"]')

// JAVASCRIPT
document.querySelector('[id^="top_sub_menu_"]')