flex4 spark TextArea 垂直滚动条，搬动到控件底端

flex4 spark TextArea 垂直滚动条，移动到控件底端
http://tieba.baidu.com/f?kz=832905984
http://flex4jiaocheng.com/blog/293#comment-form

my_main_log_txt.verticalScrollPosition = my_main_log_txt.maxVerticalScrollPosition;//my_main_log_txt.textDisplay.verticalScrollPosition = my_main_log_txt.explicitMaxWidth;//my_main_log_txt.scrollToRange(my_main_log_txt.textDisplay.verticalScrollPosition,my_main_log_txt.maxHeight);my_main_log_txt.scroller.verticalScrollBar.value = my_main_log_txt.scroller.verticalScrollBar.maximum;my_main_log_txt.validateNow();