void script_157(int arg0,int arg1,int arg2,int arg3) {
	int ivar4;
	int ivar5;
	ivar4 = subtract(getWidgetScrollMaxV(new WidgetPointer(arg1)), getWidgetActualHeight(new WidgetPointer(arg1)));
	if (((boolean)ivar4)) {
		ivar4 = 1;
	}
	if (arg2 < 0) {
		arg2 = 0;
	}
	if (arg2 > ivar4) {
		arg2 = ivar4;
	}
	cs2method2100(0, arg2, new WidgetPointer(arg1));
	ivar5 = 0;
	if (setWidgetRegister(new WidgetPointer(arg0), 1) && ((boolean)arg3)) {
		ivar5 = subtract(subtract(getWidgetActualHeight(new WidgetPointer(arg0)), 32), getWidgetActualHeight());
		setWidgetPosition(0, add(16, divide(multiply(ivar5, arg2), ivar4)), 0, 0);
		if (setWidgetRegister(new WidgetPointer(arg0), 2)) {
			setWidgetPosition(0, getWidgetActualY(), 0, 0);
		}
		if (setWidgetRegister(new WidgetPointer(arg0), 3)) {
			setWidgetPosition(0, subtract(add(getWidgetActualY(), getWidgetActualHeight()), 5), 0, 0);
		}
	}
	return;
}