Question

function areaMe(area){
                    var barea = $('#barea').val();
                    if(barea.indexOf(area)!=-1){
                        barea=barea.replace(area, ""); // remove
                    }else{
                        barea+=area; // inlcui
                    }
                    $('#barea').val(barea);
                }

It doesn’t work if the #barea input is hidden…

Answer 1

For a hidden input I always use

var barea = $('#barea').attr('value');

$('#barea').attr('value',barea);

not val(). I’ve never had luck changing the value of an input type=hidden any other way.

If barea isn’t a input type=hidden, then you’ll need to include the html for it. Note that it must be some type of input as val() only works on inputs, selects, and textareas.