How can I get this hittest to work -

i'm creating game player holding baseball bat , when click button swing bat. when swing bat hit enemy enemy goes flying off in opposite direction of hit them golf ball. have done moving , attacking function working how can register hittest hits enemy when facing towards , enemy going back. done far:

package  {     import flash.display.movieclip;     import flash.events.event;     import flash.events.keyboardevent;     import flash.events.mouseevent;     import flash.ui.keyboard;      public class player extends movieclip     {         var walkspeed:number = 4;         var walkright:boolean = false;         var walkleft:boolean = false;         var walkup:boolean = false;         var walkdown:boolean = false;         var attacking:boolean = false;          public function player()         {             stage.addeventlistener(keyboardevent.key_down , walk);             addeventlistener(event.enter_frame, update);             stage.addeventlistener(keyboardevent.key_up, stopwalk);             stage.addeventlistener(mouseevent.click, attack);         }          function walk(event:keyboardevent)         {              if (event.keycode == 68)             {                 walkright = true;             }             if (event.keycode == 87)             {                 walkup = true;             }             if (event.keycode == 65)             {                 walkleft = true;             }             if (event.keycode == 83)             {                 walkdown = true;             }         }          function update(event:event)         {             if (attacking == true)             {                 walkright = false;                 walkleft = false;                 walkup = false;                 walkdown = false;             }             else if (attacking == false)             {                 var dx = parent.mousex - x;                 var dy = parent.mousey - y;                 var angle = math.atan2(dy,dx) / math.pi * 180;                 rotation = angle;                  if (walkright == true)                 {                     x +=  walkspeed;                     gotoandstop('walk');                 }                 if (walkup == true)                 {                     y -=  walkspeed;                     gotoandstop('walk');                 }                 if (walkleft == true)                 {                     x -=  walkspeed;                     gotoandstop('walk');                 }                 if (walkdown == true)                 {                     y +=  walkspeed;                     gotoandstop('walk');                 }             }           }          function stopwalk(event:keyboardevent)         {             if (attacking == false)             {                 if (event.keycode == 68)                 {                     event.keycode = 0;                     walkright = false;                     gotoandstop('stance');                 }                 if (event.keycode == 87)                 {                     event.keycode = 0;                     walkup = false;                     gotoandstop('stance');                 }                 if (event.keycode == 65)                 {                     event.keycode = 0;                     walkleft = false;                     gotoandstop('stance');                 }                 if (event.keycode == 83)                 {                     event.keycode = 0;                     walkdown = false;                     gotoandstop('stance');                 }             }         }          function attack(event:mouseevent)         {             if (attacking == false)             {                 attacking = true;                 gotoandstop('attack');             }         }     } } 

when character's direction changes, change variable depending on way facing, example; direction = 0 when facing down, 1 when facing right, etc. use , enemy's position work out whether or not enemy has been hit. making enemy fly back, character's direction work out way fly back. give example code explain, i'm on tablet.