how can i make button stay down state when i click it ? Help please

hi guys, i'm new @ code writing

i made drop down menu want make buttons stay down state until click button

 

here code :

 

concept1btn.visible = false;

concept2btn.visible = false;

concept3btn.visible = false;

concept4btn.visible = false;

concept5btn.visible = false;

concept6btn.visible = false;

 

this.addeventlistener(mouseevent.mouse_over,drop);

this.addeventlistener(mouseevent.mouse_out,up);

this.addeventlistener(mouseevent.mouse_down,down);

 

function drop(e:mouseevent) {

  concept1btn.visible = true;

  concept2btn.visible = true;

  concept3btn.visible = true;

  concept4btn.visible = true;

  concept5btn.visible = true;

  concept6btn.visible = true;

}

 

function up(e:mouseevent) {

 

  concept1btn.visible = false;

  concept2btn.visible = false;

  concept3btn.visible = false;

  concept4btn.visible = false;

  concept5btn.visible = false;

  concept6btn.visible = false;

 

}

 

function down(e:mouseevent) {

 

  concept1btn.upstate = concept1btn.downstate;

  concept1btn.overstate = concept1btn.downstate;

what else should add ???

}

use boolean var , upstate & downstate properties:

 

 var _down: boolean = true; var buttonup: displayobject = my_btn.upstate; //store upstate use again  function checkstatus(): void {      if (_down == true) {         my_btn.upstate = my_btn.downstate;         _down = false;     }     else {         my_btn.upstate = buttonup;         _down = true;     } }   my_btn.addeventlistener(mouseevent.click, onclick); function onclick(event: mouseevent): void {     checkstatus(); } 

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