Flash HTML5 canvas conditions for audio.pause and resume function

Despite my readings I'm still limited in javascipt / soundJS syntax with using flash html5 canvas. I would like to pause and resume my sound with mouseover and mouseout events on the same button. I mean:

• You hover the button: the music starts.
• You mouseout: the music pauses.
• You hover it again: it resumes from the position it has been paused with precedence.

According to the SoundInstance Class doc, you can do that with myInstance.pause(); and myInstance.resume(); methods. And I suppose "var sound;" behaves likes "myInstance" since sound.pause(); works.

With the js code below I can pause the sound and resume my sound, but not on the same button, I need a button_2 to do that.

I think I'm missing a condition in mouseover function to "check if the sound is paused or not and then resume it or start playing.

var sound;
function fl_MouseOverHandler(){  
    sound = playSound("monstres"); 
}  
this.mybutton.addEventListener("mouseover", fl_MouseOverHandler);  


function fl_MouseOutHandler()  { 
    sound.pause();  
} 
this.mybutton.addEventListener("mouseout", fl_MouseOutHandler);  

function fl_MouseOverHandler_2(){  
    sound.resume();
}  
this.mybutton_2.addEventListener("mouseover", fl_MouseOverHandler_2);

Any hint or link is welcome. Thank you.

what about something like this?

var isPlaying = false;

function togglePlayback(){
    if(isPlaying){
        isPlaying = false;
        sound.pause();
    } else {
        isPlaying = true;
        sound.resume();
    }
}

this.some_button.addEventListener("some_event", togglePlayback );