jquery的clone方法应用于textarea和select的bug修复

(function (original) {
jQuery.fn.clone = function () {
var result = original.apply(this, arguments),
my_textareas = this.find('textarea').add(this.filter('textarea')),
result_textareas = result.find('textarea').add(result.filter('textarea')),
my_selects = this.find('select').add(this.filter('select')),
result_selects = result.find('select').add(result.filter('select'));

for (var i = 0, l = my_textareas.length; i < l; ++i) $(result_textareas[i]).val($(my_textareas[i]).val());
for (var i = 0, l = my_selects.length; i < l; ++i) result_selects[i].selectedIndex = my_selects[i].selectedIndex;

return result;
};
}) (jQuery.fn.clone);