Flash AS 制作创意的鼠标经过的网页导航

var my_B:Boolean = false; 
my_mc.onEnterFrame = function() { 
if (!my_B) { 
my_mc.prevFrame(); 
} else { 
my_mc.nextFrame(); 
} 
}; 
my_mc.mc_bg.onEnterFrame = function() { 
if (my_mc.mc_bg.hitTest(_root._xmouse, _root._ymouse, 1) == false) { 
my_B = false; 
my_mc.prevFrame(); 
} 
};