How about this?
def ListStringWidget(field,value,**attributes):
_id = '%s_%s' % (field._tablename, field.name)
_class = isinstance(field.type,str) and field.type or None
_name = field.name
requires = field.requires
items=[LI(INPUT(_id=_id,_class=_class,_name=_name,value=v)) for v
in value or [''] if v.strip()]
script=SCRIPT("""
// from http://refactormycode.com/codes/694-expanding-input-list-using-jquery
(function(){$.fn.grow_input = function() { return this.each(function()
{ var ul = this;$(ul).find(":text").keypress(function (e) { return
(e.which == ENTER_KEY) ? enter_press(ul) : true;}); }); };
var ENTER_KEY = 13;
function enter_press(ul) { var new_line = make_line(ul);
remove_empty_lines(ul); new_line.appendTo(ul);
new_line.find(":text").focus();
return false;
} function make_line(ul) { var line = $
(ul).find("li:first").clone(true); line.find(':text').val('');
return line;
}
function remove_empty_lines(ul) { $(ul).find("li").each(function()
{var trimmed = jQuery.trim($(this.firstChild).val()); if (trimmed=='')
{ $(this).remove(); } else {$
(this.firstChild).val(trimmed); } }); }
})
();
jQuery(document).ready(function(){jQuery('#
%s_grow_input').grow_input();});
""" % _id)
attributes['_id']=_id+'_grow_input'
return TAG[''](UL(*items,**attributes),script)
db.define_table('person',Field('name'),Field('addresses','list:string',widget=ListStringWidget))
