perhaps this works
def ListStringWidget(field,value,**attributes):
_id = '%s_%s' % (field._tablename, field.name)
_name = field.name
if field.type=='list:integer': _class = 'integer'
else: _class = 'string'
requires = field.requires
items=[LI(INPUT(_id=_id,_class=_class,_name=_name,value=v,hideerror=True)) for v in value or ['']]
#if items:
# items[-1][0]['hideerror'] = False
script=SCRIPT("""
// from http://refactormycode.com/codes/694-expanding-input-list-using-jquery
(function(){
jQuery.fn.grow_input = function() {
return this.each(function() {
var ul = this;
jQuery(ul).find(":text").keypress(function (e) { return (e.which == 13) ? pe(ul) : true; });
});
};
function pe(ul) {
var new_line = ml(ul);
rel(ul);
new_line.appendTo(ul);
new_line.find(":text").focus();
return false;
}
function ml(ul) {
var line = jQuery(ul).find("li:first").clone(true);
line.find(':text').val('');
return line;
}
function rel(ul) {
jQuery(ul).find("li").each(function() {
var trimmed = jQuery.trim(jQuery(this.firstChild).val());
if (trimmed=='') jQuery(this).remove(); else jQuery(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))
