barPic1_mc.gotoAndStop(1); //拉霸圖1先停在影格1
barPic2_mc.gotoAndStop(2); //拉霸圖2先停在影格2
barPic3_mc.gotoAndStop(3); //拉霸圖1先停在影格3

//設定停止按鈕無法動作
stop_btn.enabled = false;