protected var _glowFilter:GlowFilter = new GlowFilter(0x000000, 1.0, 2, 2, 10, 1);
protected var _middleTextField:JTextField;
_middleTextField = JTextField();
/** 注意要加此设置才会有滤镜效果 */
_middleTextField.getTextField().blendMode = BlendMode.LAYER;
_middleTextField.getTextField().filters = [_glowFilter];
_middleTextField.getTextField().multiline = true;
_middleTextField.setBackgroundDecorator(null);
_middleTextField.setEditable(false);