.....
//
trapezoid.graphics.clear();
trapezoid.graphics.beginFill(0xc0c000,0.6);
trapezoid.graphics.moveTo(SBPOSX+SBWIDTH+5,BOXPOSY+firstline);
trapezoid.graphics.lineTo(SBPOSX+SBWIDTH+5,BOXPOSY+lastline);
trapezoid.graphics.lineTo(SVPOSX-1,SVPOSY+SVHEIGHT);
trapezoid.graphics.lineTo(SVPOSX-1,SVPOSY);
trapezoid.graphics.endFill();
.....