flash改变网页的背景颜色

import fl.controls.ColorPicker;
import fl.events.ColorPickerEvent;
import flash.external.ExternalInterface;
back_colorpicker.addEventListener("change",onColorChange);
function onColorChange(_evt:ColorPickerEvent) {
ExternalInterface.call("setColor",_evt.target.hexValue );
}

<script>
function setColor(_color){
  document.body.style.backgroundColor=_color;
}
</script>