Drop target rollover

Hi
Does anybody know the correct way to call an event when using startdrag.
If an area is rolled over?

For the drop event I am using the droptarget
eg if (butt1._droptarget == “/area_Droped_1”) {

The following seems to not work for the rollover event?

if (butt1._target == “/area_Droped_1”) {
_root.area_Droped_1.visible = false;
}
any suggestions?