watir is great, though if you want to set long string to text field or textarea,
it may take a long long time to finish it when you use statement as
$browser.text_field(:name => "comment").set('long long ...... string ...')
fortunately, you can use this statement to avoid it, it is fast to set the long string with watir
$browser.text_field(:name => "comment").value = ($comments)
watir是个不错的东东，但如果你用set方法去设置一个很长的字条串的话， 那就可能需要很长的时间才能执行完这个语句，
不用担心你可以用直接设置value的值， 这样就很快了， 根本不用等待，就执行完成了