attributes - Jquery: Cloning a select list and selecting an option by its value -

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I am trying to add a selected table list to a devil table with jQuery, after doing this, I Select a specific option in the want list, I'm trying something like this: 

  // My hidden options list

Try it out: 

  $ (". ("Name", "a_dynamic_name_for_php_form") .find ("option [value = none]"). ("Selected", "true");

notice changes to the last line


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