Get value in jquery autocomplete

Question

Here is my code

jquery code

$(\"input#shopName\").autocomplete({
    source: \"getShop.php\",
    minLength: 2
});

The JSON value r

Answer 1

$("input#shopName").autocomplete({
    source: "getShop.php",
    minLength: 2,
    select: function(event, ui) { 
        $("#theHidden").val(ui.item.id) 
    }
});

See http://jqueryui.com/demos/autocomplete/#event-select