name,hiddenName 有什么区别？
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这里有详解
hiddenName : String
If specified, a hidden form field with this name is dynamically generated to store the field's data value (defaults to the underlying DOM element's name). Required for the combo's value to automatically post during a form submission. Note that the hidden field's id will also default to this name if hiddenId is not specified. The combo's id and the hidden field's ids should be different, since no two DOM nodes should share the same id, so if the combo and hidden names are the same, you should specify a unique hiddenId.