Aetae,
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Цитата:
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достаточно одной таблетки
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<input type="checkbox" name="checkbox" value="" item_cat="list">
<input type="checkbox" name="checkbox" value="" item_cat="food">
<input type="checkbox" name="checkbox" value="" item_cat="cars">
<input type="//hidden" name="checkbox-list" value="">
<script type="text/javascript" src="https://code.jquery.com/jquery-1.9.1.js"></script>
<script>
$(document).on('click', 'input[name="checkbox"]', function(){
$('input[name="checkbox-list"]').val(
$.map($('input[name="checkbox"]:checked'),function(el){
return el.getAttribute('item_cat')
})
)
});
</script>