flex中textarea控件的htmltext属性动态添加样式-htmltext flex properties in the textarea control to dynamically add style

自定义的控件 RollNumEffect 为滚动数字控件， 有 3 个属性为 initNum,num,duration，分别决定初始化数值，目标数值，及滚动速度-The custom the control RollNumEffect for scroll digital control Three properties initNum, num, duration, respectively, decided to initialize the values​ ​