Error when deleting tags with only numbers

[Santiago Dimattia]

When you add a tag with only numbers and you want to remove it, this happens:

Uncaught TypeError: Object 123 has no method 'toLowerCase'

[Aitor]

In line 104 you must add ".toString()":

tagname = $(this).parent().data('name').toLowerCase();
to:
tagname = $(this).parent().data('name').toString().toLowerCase();