Jquery adding and removing items from listbox

Question

I\'ve created this fiddle, it allows the user to click on either art or video, dynamically populating the the second listbox with the list associated with those selections. Ther

Answer 1

Ok to fix your add function just add the following if condition::

if($("#SelectedItems option:contains("+$(this).text()+")").length<=0)                
   inHTML += '' + $(this).text() + '';

to remove items::

$('#remove').click(function () {
    $("#SelectedItems option:selected").each(function () {
       $(this).remove();
    });
});

here is the example after i updated it jsfiddle